Finding the Fourth Proportional to 931,216.48, 1,284,963.42 and 538,816.89

Step by Step Solution

1. Step 1: Write the proportion equation
   931,216.48 : 1,284,963.42 = 538,816.89 : x
2. Step 2: Convert to fraction form
   931,216.48/1,284,963.42 = 538,816.89/x
3. Step 3: Cross multiply
   931,216.48x = 1,284,963.42 × 538,816.89
4. Step 4: Simplify right side
   931,216.48x = 692,359,993,728.16
5. Step 5: Solve for x
   x = 692,359,993,728.16/931,216.48
6. Step 6: Final answer
   x = 743,500.58