Finding the Fourth Proportional to 1,047.60, 1,569.31 and 498.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.60 : 1,569.31 = 498.15 : x
2. Step 2: Convert to fraction form
   1,047.60/1,569.31 = 498.15/x
3. Step 3: Cross multiply
   1,047.60x = 1,569.31 × 498.15
4. Step 4: Simplify right side
   1,047.60x = 781,750.53
5. Step 5: Solve for x
   x = 781,750.53/1,047.60
6. Step 6: Final answer
   x = 746.23