Finding the Fourth Proportional to 1,432.62, 1,978.58 and 1,153.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.62 : 1,978.58 = 1,153.77 : x
2. Step 2: Convert to fraction form
   1,432.62/1,978.58 = 1,153.77/x
3. Step 3: Cross multiply
   1,432.62x = 1,978.58 × 1,153.77
4. Step 4: Simplify right side
   1,432.62x = 2,282,820.48
5. Step 5: Solve for x
   x = 2,282,820.48/1,432.62
6. Step 6: Final answer
   x = 1,593.46