Finding the Fourth Proportional to 9,135.96, 12,607.55 and 5,156.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,135.96 : 12,607.55 = 5,156.93 : x
2. Step 2: Convert to fraction form
   9,135.96/12,607.55 = 5,156.93/x
3. Step 3: Cross multiply
   9,135.96x = 12,607.55 × 5,156.93
4. Step 4: Simplify right side
   9,135.96x = 65,016,277.89
5. Step 5: Solve for x
   x = 65,016,277.89/9,135.96
6. Step 6: Final answer
   x = 7,116.53