Finding the Fourth Proportional to 9,411.68, 12,988.02 and 5,162.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.68 : 12,988.02 = 5,162.98 : x
2. Step 2: Convert to fraction form
   9,411.68/12,988.02 = 5,162.98/x
3. Step 3: Cross multiply
   9,411.68x = 12,988.02 × 5,162.98
4. Step 4: Simplify right side
   9,411.68x = 67,056,887.50
5. Step 5: Solve for x
   x = 67,056,887.50/9,411.68
6. Step 6: Final answer
   x = 7,124.86