Finding the Fourth Proportional to 870,892.16, 1,306,740 and 397,722.56

Step by Step Solution

1. Step 1: Write the proportion equation
   870,892.16 : 1,306,740 = 397,722.56 : x
2. Step 2: Convert to fraction form
   870,892.16/1,306,740 = 397,722.56/x
3. Step 3: Cross multiply
   870,892.16x = 1,306,740 × 397,722.56
4. Step 4: Simplify right side
   870,892.16x = 519,719,978,054.40
5. Step 5: Solve for x
   x = 519,719,978,054.40/870,892.16
6. Step 6: Final answer
   x = 596,767.32