Finding the Fourth Proportional to 10,131.85, 13,981.50 and 5,655.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.85 : 13,981.50 = 5,655.50 : x
2. Step 2: Convert to fraction form
   10,131.85/13,981.50 = 5,655.50/x
3. Step 3: Cross multiply
   10,131.85x = 13,981.50 × 5,655.50
4. Step 4: Simplify right side
   10,131.85x = 79,072,308.50
5. Step 5: Solve for x
   x = 79,072,308.50/10,131.85
6. Step 6: Final answer
   x = 7,804.33