Finding the Fourth Proportional to 709,124.00, 978,587.67 and 386,831.28

Step by Step Solution

1. Step 1: Write the proportion equation
   709,124.00 : 978,587.67 = 386,831.28 : x
2. Step 2: Convert to fraction form
   709,124.00/978,587.67 = 386,831.28/x
3. Step 3: Cross multiply
   709,124.00x = 978,587.67 × 386,831.28
4. Step 4: Simplify right side
   709,124.00x = 378,548,320,978.32
5. Step 5: Solve for x
   x = 378,548,320,978.32/709,124.00
6. Step 6: Final answer
   x = 533,825.29