Finding the Fourth Proportional to 10,113.32, 15,160.61 and 5,172.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,113.32 : 15,160.61 = 5,172.07 : x
2. Step 2: Convert to fraction form
   10,113.32/15,160.61 = 5,172.07/x
3. Step 3: Cross multiply
   10,113.32x = 15,160.61 × 5,172.07
4. Step 4: Simplify right side
   10,113.32x = 78,411,736.16
5. Step 5: Solve for x
   x = 78,411,736.16/10,113.32
6. Step 6: Final answer
   x = 7,753.31