Finding the Fourth Proportional to 1,498.32, 2,245.32 and 921.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.32 : 2,245.32 = 921.60 : x
2. Step 2: Convert to fraction form
   1,498.32/2,245.32 = 921.60/x
3. Step 3: Cross multiply
   1,498.32x = 2,245.32 × 921.60
4. Step 4: Simplify right side
   1,498.32x = 2,069,286.91
5. Step 5: Solve for x
   x = 2,069,286.91/1,498.32
6. Step 6: Final answer
   x = 1,381.07