Finding the Fourth Proportional to 615,522.69, 849,805.32 and 397,845.30

Step by Step Solution

1. Step 1: Write the proportion equation
   615,522.69 : 849,805.32 = 397,845.30 : x
2. Step 2: Convert to fraction form
   615,522.69/849,805.32 = 397,845.30/x
3. Step 3: Cross multiply
   615,522.69x = 849,805.32 × 397,845.30
4. Step 4: Simplify right side
   615,522.69x = 338,091,052,477.00
5. Step 5: Solve for x
   x = 338,091,052,477.00/615,522.69
6. Step 6: Final answer
   x = 549,274.72