Finding the Fourth Proportional to 7,811.88, 10,780.56 and 4,275.06

Step by Step Solution

1. Step 1: Write the proportion equation
   7,811.88 : 10,780.56 = 4,275.06 : x
2. Step 2: Convert to fraction form
   7,811.88/10,780.56 = 4,275.06/x
3. Step 3: Cross multiply
   7,811.88x = 10,780.56 × 4,275.06
4. Step 4: Simplify right side
   7,811.88x = 46,087,540.83
5. Step 5: Solve for x
   x = 46,087,540.83/7,811.88
6. Step 6: Final answer
   x = 5,899.67