Finding the Fourth Proportional to 12,020,609.98, 17,987,814.57 and 10,406,929.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,020,609.98 : 17,987,814.57 = 10,406,929.42 : x
2. Step 2: Convert to fraction form
   12,020,609.98/17,987,814.57 = 10,406,929.42/x
3. Step 3: Cross multiply
   12,020,609.98x = 17,987,814.57 × 10,406,929.42
4. Step 4: Simplify right side
   12,020,609.98x = 187,197,916,650,037.66
5. Step 5: Solve for x
   x = 187,197,916,650,037.66/12,020,609.98
6. Step 6: Final answer
   x = 15,573,079.65