Finding the Fourth Proportional to 9,131.92, 12,602.82 and 5,153.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.92 : 12,602.82 = 5,153.20 : x
2. Step 2: Convert to fraction form
   9,131.92/12,602.82 = 5,153.20/x
3. Step 3: Cross multiply
   9,131.92x = 12,602.82 × 5,153.20
4. Step 4: Simplify right side
   9,131.92x = 64,944,852.02
5. Step 5: Solve for x
   x = 64,944,852.02/9,131.92
6. Step 6: Final answer
   x = 7,111.85