Finding the Fourth Proportional to 1,766.56, 2,665.28 and 1,761.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.56 : 2,665.28 = 1,761.72 : x
2. Step 2: Convert to fraction form
   1,766.56/2,665.28 = 1,761.72/x
3. Step 3: Cross multiply
   1,766.56x = 2,665.28 × 1,761.72
4. Step 4: Simplify right side
   1,766.56x = 4,695,477.08
5. Step 5: Solve for x
   x = 4,695,477.08/1,766.56
6. Step 6: Final answer
   x = 2,657.98