Finding the Fourth Proportional to 1,493.59, 2,240.52 and 763.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.59 : 2,240.52 = 763.78 : x
2. Step 2: Convert to fraction form
   1,493.59/2,240.52 = 763.78/x
3. Step 3: Cross multiply
   1,493.59x = 2,240.52 × 763.78
4. Step 4: Simplify right side
   1,493.59x = 1,711,264.37
5. Step 5: Solve for x
   x = 1,711,264.37/1,493.59
6. Step 6: Final answer
   x = 1,145.74