Finding the Fourth Proportional to 15,612.59, 21,547.35 and 8,900.63

Step by Step Solution

1. Step 1: Write the proportion equation
   15,612.59 : 21,547.35 = 8,900.63 : x
2. Step 2: Convert to fraction form
   15,612.59/21,547.35 = 8,900.63/x
3. Step 3: Cross multiply
   15,612.59x = 21,547.35 × 8,900.63
4. Step 4: Simplify right side
   15,612.59x = 191,784,882.09
5. Step 5: Solve for x
   x = 191,784,882.09/15,612.59
6. Step 6: Final answer
   x = 12,283.99