Finding the Fourth Proportional to 15,830.31, 21,845.91 and 8,756.98

Step by Step Solution

1. Step 1: Write the proportion equation
   15,830.31 : 21,845.91 = 8,756.98 : x
2. Step 2: Convert to fraction form
   15,830.31/21,845.91 = 8,756.98/x
3. Step 3: Cross multiply
   15,830.31x = 21,845.91 × 8,756.98
4. Step 4: Simplify right side
   15,830.31x = 191,304,196.95
5. Step 5: Solve for x
   x = 191,304,196.95/15,830.31
6. Step 6: Final answer
   x = 12,084.68