Finding the Fourth Proportional to 1,117.40, 1,542.78 and 697.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.40 : 1,542.78 = 697.83 : x
2. Step 2: Convert to fraction form
   1,117.40/1,542.78 = 697.83/x
3. Step 3: Cross multiply
   1,117.40x = 1,542.78 × 697.83
4. Step 4: Simplify right side
   1,117.40x = 1,076,598.17
5. Step 5: Solve for x
   x = 1,076,598.17/1,117.40
6. Step 6: Final answer
   x = 963.49