Finding the Fourth Proportional to 7,188.64, 10,788.72 and 3,726.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,188.64 : 10,788.72 = 3,726.88 : x
2. Step 2: Convert to fraction form
   7,188.64/10,788.72 = 3,726.88/x
3. Step 3: Cross multiply
   7,188.64x = 10,788.72 × 3,726.88
4. Step 4: Simplify right side
   7,188.64x = 40,208,264.79
5. Step 5: Solve for x
   x = 40,208,264.79/7,188.64
6. Step 6: Final answer
   x = 5,593.31