Finding the Fourth Proportional to 21,005,706.88, 31,490,585.12 and 8,061,145.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,005,706.88 : 31,490,585.12 = 8,061,145.52 : x
2. Step 2: Convert to fraction form
   21,005,706.88/31,490,585.12 = 8,061,145.52/x
3. Step 3: Cross multiply
   21,005,706.88x = 31,490,585.12 × 8,061,145.52
4. Step 4: Simplify right side
   21,005,706.88x = 253,850,189,162,266.66
5. Step 5: Solve for x
   x = 253,850,189,162,266.66/21,005,706.88
6. Step 6: Final answer
   x = 12,084,820.12