Finding the Fourth Proportional to 1,101.40, 1,519.72 and 747.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.40 : 1,519.72 = 747.61 : x
2. Step 2: Convert to fraction form
   1,101.40/1,519.72 = 747.61/x
3. Step 3: Cross multiply
   1,101.40x = 1,519.72 × 747.61
4. Step 4: Simplify right side
   1,101.40x = 1,136,152.20
5. Step 5: Solve for x
   x = 1,136,152.20/1,101.40
6. Step 6: Final answer
   x = 1,031.56