Finding the Fourth Proportional to 10,131.89, 13,981.89 and 5,656.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.89 : 13,981.89 = 5,656.75 : x
2. Step 2: Convert to fraction form
   10,131.89/13,981.89 = 5,656.75/x
3. Step 3: Cross multiply
   10,131.89x = 13,981.89 × 5,656.75
4. Step 4: Simplify right side
   10,131.89x = 79,092,056.26
5. Step 5: Solve for x
   x = 79,092,056.26/10,131.89
6. Step 6: Final answer
   x = 7,806.25