Finding the Fourth Proportional to 10,055.76, 15,086.88 and 7,131.66

Step by Step Solution

1. Step 1: Write the proportion equation
   10,055.76 : 15,086.88 = 7,131.66 : x
2. Step 2: Convert to fraction form
   10,055.76/15,086.88 = 7,131.66/x
3. Step 3: Cross multiply
   10,055.76x = 15,086.88 × 7,131.66
4. Step 4: Simplify right side
   10,055.76x = 107,594,498.62
5. Step 5: Solve for x
   x = 107,594,498.62/10,055.76
6. Step 6: Final answer
   x = 10,699.79