Finding the Fourth Proportional to 21,561,089.97, 32,290,076.16 and 12,435,521.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,561,089.97 : 32,290,076.16 = 12,435,521.36 : x
2. Step 2: Convert to fraction form
   21,561,089.97/32,290,076.16 = 12,435,521.36/x
3. Step 3: Cross multiply
   21,561,089.97x = 32,290,076.16 × 12,435,521.36
4. Step 4: Simplify right side
   21,561,089.97x = 401,543,931,884,432
5. Step 5: Solve for x
   x = 401,543,931,884,432/21,561,089.97
6. Step 6: Final answer
   x = 18,623,545.12