Finding the Fourth Proportional to 15,921,002.42, 21,969,465.52 and 9,307,137.16

Step by Step Solution

1. Step 1: Write the proportion equation
   15,921,002.42 : 21,969,465.52 = 9,307,137.16 : x
2. Step 2: Convert to fraction form
   15,921,002.42/21,969,465.52 = 9,307,137.16/x
3. Step 3: Cross multiply
   15,921,002.42x = 21,969,465.52 × 9,307,137.16
4. Step 4: Simplify right side
   15,921,002.42x = 204,472,828,926,530.72
5. Step 5: Solve for x
   x = 204,472,828,926,530.72/15,921,002.42
6. Step 6: Final answer
   x = 12,842,961.99