Finding the Fourth Proportional to 10,131.45, 13,981.91 and 5,655.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.45 : 13,981.91 = 5,655.12 : x
2. Step 2: Convert to fraction form
   10,131.45/13,981.91 = 5,655.12/x
3. Step 3: Cross multiply
   10,131.45x = 13,981.91 × 5,655.12
4. Step 4: Simplify right side
   10,131.45x = 79,069,350.60
5. Step 5: Solve for x
   x = 79,069,350.60/10,131.45
6. Step 6: Final answer
   x = 7,804.35