Finding the Fourth Proportional to 1,111.55, 1,670.76 and 703.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.55 : 1,670.76 = 703.31 : x
2. Step 2: Convert to fraction form
   1,111.55/1,670.76 = 703.31/x
3. Step 3: Cross multiply
   1,111.55x = 1,670.76 × 703.31
4. Step 4: Simplify right side
   1,111.55x = 1,175,053.86
5. Step 5: Solve for x
   x = 1,175,053.86/1,111.55
6. Step 6: Final answer
   x = 1,057.14