Finding the Fourth Proportional to 397,150.47, 548,071.32 and 215,862.81

Step by Step Solution

1. Step 1: Write the proportion equation
   397,150.47 : 548,071.32 = 215,862.81 : x
2. Step 2: Convert to fraction form
   397,150.47/548,071.32 = 215,862.81/x
3. Step 3: Cross multiply
   397,150.47x = 548,071.32 × 215,862.81
4. Step 4: Simplify right side
   397,150.47x = 118,308,215,215.61
5. Step 5: Solve for x
   x = 118,308,215,215.61/397,150.47
6. Step 6: Final answer
   x = 297,892.67