Finding the Fourth Proportional to 9,128.07, 12,599.43 and 5,352.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.07 : 12,599.43 = 5,352.05 : x
2. Step 2: Convert to fraction form
   9,128.07/12,599.43 = 5,352.05/x
3. Step 3: Cross multiply
   9,128.07x = 12,599.43 × 5,352.05
4. Step 4: Simplify right side
   9,128.07x = 67,432,779.33
5. Step 5: Solve for x
   x = 67,432,779.33/9,128.07
6. Step 6: Final answer
   x = 7,387.41