Finding the Fourth Proportional to 9,385.78, 12,952.27 and 5,136.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,385.78 : 12,952.27 = 5,136.83 : x
2. Step 2: Convert to fraction form
   9,385.78/12,952.27 = 5,136.83/x
3. Step 3: Cross multiply
   9,385.78x = 12,952.27 × 5,136.83
4. Step 4: Simplify right side
   9,385.78x = 66,533,531.50
5. Step 5: Solve for x
   x = 66,533,531.50/9,385.78
6. Step 6: Final answer
   x = 7,088.76