Finding the Fourth Proportional to 1,500.76, 2,247.30 and 921.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.76 : 2,247.30 = 921.88 : x
2. Step 2: Convert to fraction form
   1,500.76/2,247.30 = 921.88/x
3. Step 3: Cross multiply
   1,500.76x = 2,247.30 × 921.88
4. Step 4: Simplify right side
   1,500.76x = 2,071,740.92
5. Step 5: Solve for x
   x = 2,071,740.92/1,500.76
6. Step 6: Final answer
   x = 1,380.46