Finding the Fourth Proportional to 11,139.10, 16,713.15 and 4,900.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.10 : 16,713.15 = 4,900.30 : x
2. Step 2: Convert to fraction form
   11,139.10/16,713.15 = 4,900.30/x
3. Step 3: Cross multiply
   11,139.10x = 16,713.15 × 4,900.30
4. Step 4: Simplify right side
   11,139.10x = 81,899,448.95
5. Step 5: Solve for x
   x = 81,899,448.95/11,139.10
6. Step 6: Final answer
   x = 7,352.43