Finding the Fourth Proportional to 1,056.32, 1,581.72 and 746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.32 : 1,581.72 = 746.50 : x
2. Step 2: Convert to fraction form
   1,056.32/1,581.72 = 746.50/x
3. Step 3: Cross multiply
   1,056.32x = 1,581.72 × 746.50
4. Step 4: Simplify right side
   1,056.32x = 1,180,753.98
5. Step 5: Solve for x
   x = 1,180,753.98/1,056.32
6. Step 6: Final answer
   x = 1,117.80