Finding the Fourth Proportional to 5,261.88, 7,275.24 and 5,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,261.88 : 7,275.24 = 5,178.72 : x
2. Step 2: Convert to fraction form
   5,261.88/7,275.24 = 5,178.72/x
3. Step 3: Cross multiply
   5,261.88x = 7,275.24 × 5,178.72
4. Step 4: Simplify right side
   5,261.88x = 37,676,430.89
5. Step 5: Solve for x
   x = 37,676,430.89/5,261.88
6. Step 6: Final answer
   x = 7,160.26