Finding the Fourth Proportional to 1,577.78, 2,363.01 and 1,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,577.78 : 2,363.01 = 1,440.50 : x
2. Step 2: Convert to fraction form
   1,577.78/2,363.01 = 1,440.50/x
3. Step 3: Cross multiply
   1,577.78x = 2,363.01 × 1,440.50
4. Step 4: Simplify right side
   1,577.78x = 3,403,915.91
5. Step 5: Solve for x
   x = 3,403,915.91/1,577.78
6. Step 6: Final answer
   x = 2,157.41