Finding the Fourth Proportional to 1,773.62, 2,656.10 and 1,721.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.62 : 2,656.10 = 1,721.78 : x
2. Step 2: Convert to fraction form
   1,773.62/2,656.10 = 1,721.78/x
3. Step 3: Cross multiply
   1,773.62x = 2,656.10 × 1,721.78
4. Step 4: Simplify right side
   1,773.62x = 4,573,219.86
5. Step 5: Solve for x
   x = 4,573,219.86/1,773.62
6. Step 6: Final answer
   x = 2,578.47