Finding the Fourth Proportional to 10,613.18, 15,919.59 and 3,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.18 : 15,919.59 = 3,687.50 : x
2. Step 2: Convert to fraction form
   10,613.18/15,919.59 = 3,687.50/x
3. Step 3: Cross multiply
   10,613.18x = 15,919.59 × 3,687.50
4. Step 4: Simplify right side
   10,613.18x = 58,703,488.13
5. Step 5: Solve for x
   x = 58,703,488.13/10,613.18
6. Step 6: Final answer
   x = 5,531.19