Finding the Fourth Proportional to 9,131.30, 12,600.66 and 5,152.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.30 : 12,600.66 = 5,152.78 : x
2. Step 2: Convert to fraction form
   9,131.30/12,600.66 = 5,152.78/x
3. Step 3: Cross multiply
   9,131.30x = 12,600.66 × 5,152.78
4. Step 4: Simplify right side
   9,131.30x = 64,928,428.83
5. Step 5: Solve for x
   x = 64,928,428.83/9,131.30
6. Step 6: Final answer
   x = 7,110.54