Finding the Fourth Proportional to 9,348.17, 12,900.10 and 5,156.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,348.17 : 12,900.10 = 5,156.42 : x
2. Step 2: Convert to fraction form
   9,348.17/12,900.10 = 5,156.42/x
3. Step 3: Cross multiply
   9,348.17x = 12,900.10 × 5,156.42
4. Step 4: Simplify right side
   9,348.17x = 66,518,333.64
5. Step 5: Solve for x
   x = 66,518,333.64/9,348.17
6. Step 6: Final answer
   x = 7,115.65