Finding the Fourth Proportional to 9,139.32, 13,699.86 and 3,588.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.32 : 13,699.86 = 3,588.60 : x
2. Step 2: Convert to fraction form
   9,139.32/13,699.86 = 3,588.60/x
3. Step 3: Cross multiply
   9,139.32x = 13,699.86 × 3,588.60
4. Step 4: Simplify right side
   9,139.32x = 49,163,317.60
5. Step 5: Solve for x
   x = 49,163,317.60/9,139.32
6. Step 6: Final answer
   x = 5,379.32