Finding the Fourth Proportional to 6,602.52, 9,908.64 and 3,139.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,602.52 : 9,908.64 = 3,139.80 : x
2. Step 2: Convert to fraction form
   6,602.52/9,908.64 = 3,139.80/x
3. Step 3: Cross multiply
   6,602.52x = 9,908.64 × 3,139.80
4. Step 4: Simplify right side
   6,602.52x = 31,111,147.87
5. Step 5: Solve for x
   x = 31,111,147.87/6,602.52
6. Step 6: Final answer
   x = 4,712.01