Finding the Fourth Proportional to 12,039.88, 16,620.72 and 9,056.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,039.88 : 16,620.72 = 9,056.86 : x
2. Step 2: Convert to fraction form
   12,039.88/16,620.72 = 9,056.86/x
3. Step 3: Cross multiply
   12,039.88x = 16,620.72 × 9,056.86
4. Step 4: Simplify right side
   12,039.88x = 150,531,534.14
5. Step 5: Solve for x
   x = 150,531,534.14/12,039.88
6. Step 6: Final answer
   x = 12,502.74