Finding the Fourth Proportional to 11,111.64, 16,670.34 and 9,140.52

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.64 : 16,670.34 = 9,140.52 : x
2. Step 2: Convert to fraction form
   11,111.64/16,670.34 = 9,140.52/x
3. Step 3: Cross multiply
   11,111.64x = 16,670.34 × 9,140.52
4. Step 4: Simplify right side
   11,111.64x = 152,375,576.18
5. Step 5: Solve for x
   x = 152,375,576.18/11,111.64
6. Step 6: Final answer
   x = 13,713.15