Finding the Fourth Proportional to 23,172,681.69, 31,979,391.72 and 12,859,489.53

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172,681.69 : 31,979,391.72 = 12,859,489.53 : x
2. Step 2: Convert to fraction form
   23,172,681.69/31,979,391.72 = 12,859,489.53/x
3. Step 3: Cross multiply
   23,172,681.69x = 31,979,391.72 × 12,859,489.53
4. Step 4: Simplify right side
   23,172,681.69x = 411,238,652,999,108.62
5. Step 5: Solve for x
   x = 411,238,652,999,108.62/23,172,681.69
6. Step 6: Final answer
   x = 17,746,700.99