Finding the Fourth Proportional to 1,210,221,123.12, 1,670,876,266.86 and 987,733,514.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210,221,123.12 : 1,670,876,266.86 = 987,733,514.52 : x
2. Step 2: Convert to fraction form
   1,210,221,123.12/1,670,876,266.86 = 987,733,514.52/x
3. Step 3: Cross multiply
   1,210,221,123.12x = 1,670,876,266.86 × 987,733,514.52
4. Step 4: Simplify right side
   1,210,221,123.12x = 1,650,380,487,393,684,992
5. Step 5: Solve for x
   x = 1,650,380,487,393,684,992/1,210,221,123.12
6. Step 6: Final answer
   x = 1,363,701,604.50