Finding the Fourth Proportional to 123,788,789.42, 170,757,380.19 and 77,298,339.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,788,789.42 : 170,757,380.19 = 77,298,339.50 : x
2. Step 2: Convert to fraction form
   123,788,789.42/170,757,380.19 = 77,298,339.50/x
3. Step 3: Cross multiply
   123,788,789.42x = 170,757,380.19 × 77,298,339.50
4. Step 4: Simplify right side
   123,788,789.42x = 13,199,261,946,057,194
5. Step 5: Solve for x
   x = 13,199,261,946,057,194/123,788,789.42
6. Step 6: Final answer
   x = 106,627,280.29