Finding the Fourth Proportional to 715,446.48, 987,100.83 and 428,862

Step by Step Solution

1. Step 1: Write the proportion equation
   715,446.48 : 987,100.83 = 428,862 : x
2. Step 2: Convert to fraction form
   715,446.48/987,100.83 = 428,862/x
3. Step 3: Cross multiply
   715,446.48x = 987,100.83 × 428,862
4. Step 4: Simplify right side
   715,446.48x = 423,330,036,155.46
5. Step 5: Solve for x
   x = 423,330,036,155.46/715,446.48
6. Step 6: Final answer
   x = 591,700.49