Finding the Fourth Proportional to 9,348.32, 12,900.62 and 5,156.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,348.32 : 12,900.62 = 5,156.57 : x
2. Step 2: Convert to fraction form
   9,348.32/12,900.62 = 5,156.57/x
3. Step 3: Cross multiply
   9,348.32x = 12,900.62 × 5,156.57
4. Step 4: Simplify right side
   9,348.32x = 66,522,859.79
5. Step 5: Solve for x
   x = 66,522,859.79/9,348.32
6. Step 6: Final answer
   x = 7,116.03