Finding the Fourth Proportional to 10,121.63, 15,192.17 and 4,931.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,121.63 : 15,192.17 = 4,931.15 : x
2. Step 2: Convert to fraction form
   10,121.63/15,192.17 = 4,931.15/x
3. Step 3: Cross multiply
   10,121.63x = 15,192.17 × 4,931.15
4. Step 4: Simplify right side
   10,121.63x = 74,914,825.45
5. Step 5: Solve for x
   x = 74,914,825.45/10,121.63
6. Step 6: Final answer
   x = 7,401.46