Finding the Fourth Proportional to 9,135.47, 12,607.35 and 5,156.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,135.47 : 12,607.35 = 5,156.62 : x
2. Step 2: Convert to fraction form
   9,135.47/12,607.35 = 5,156.62/x
3. Step 3: Cross multiply
   9,135.47x = 12,607.35 × 5,156.62
4. Step 4: Simplify right side
   9,135.47x = 65,011,262.30
5. Step 5: Solve for x
   x = 65,011,262.30/9,135.47
6. Step 6: Final answer
   x = 7,116.35