Finding the Fourth Proportional to 1,111.02, 1,533.80 and 718.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.02 : 1,533.80 = 718.27 : x
2. Step 2: Convert to fraction form
   1,111.02/1,533.80 = 718.27/x
3. Step 3: Cross multiply
   1,111.02x = 1,533.80 × 718.27
4. Step 4: Simplify right side
   1,111.02x = 1,101,675.10
5. Step 5: Solve for x
   x = 1,101,675.10/1,111.02
6. Step 6: Final answer
   x = 991.59