Finding the Fourth Proportional to 15,585,979.39, 21,509,315.82 and 8,710,461.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,585,979.39 : 21,509,315.82 = 8,710,461.25 : x
2. Step 2: Convert to fraction form
   15,585,979.39/21,509,315.82 = 8,710,461.25/x
3. Step 3: Cross multiply
   15,585,979.39x = 21,509,315.82 × 8,710,461.25
4. Step 4: Simplify right side
   15,585,979.39x = 187,356,061,910,348.69
5. Step 5: Solve for x
   x = 187,356,061,910,348.69/15,585,979.39
6. Step 6: Final answer
   x = 12,020,807.76