Finding the Fourth Proportional to 10,830.86, 14,947.46 and 8,611.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,830.86 : 14,947.46 = 8,611.06 : x
2. Step 2: Convert to fraction form
   10,830.86/14,947.46 = 8,611.06/x
3. Step 3: Cross multiply
   10,830.86x = 14,947.46 × 8,611.06
4. Step 4: Simplify right side
   10,830.86x = 128,713,474.91
5. Step 5: Solve for x
   x = 128,713,474.91/10,830.86
6. Step 6: Final answer
   x = 11,883.96