Finding the Fourth Proportional to 10,131.39, 13,981.20 and 5,656.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.39 : 13,981.20 = 5,656.25 : x
2. Step 2: Convert to fraction form
   10,131.39/13,981.20 = 5,656.25/x
3. Step 3: Cross multiply
   10,131.39x = 13,981.20 × 5,656.25
4. Step 4: Simplify right side
   10,131.39x = 79,081,162.50
5. Step 5: Solve for x
   x = 79,081,162.50/10,131.39
6. Step 6: Final answer
   x = 7,805.56