Finding the Fourth Proportional to 10,068.67, 15,111.10 and 5,139.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,068.67 : 15,111.10 = 5,139.62 : x
2. Step 2: Convert to fraction form
   10,068.67/15,111.10 = 5,139.62/x
3. Step 3: Cross multiply
   10,068.67x = 15,111.10 × 5,139.62
4. Step 4: Simplify right side
   10,068.67x = 77,665,236.23
5. Step 5: Solve for x
   x = 77,665,236.23/10,068.67
6. Step 6: Final answer
   x = 7,713.56