Finding the Fourth Proportional to 397,142.01, 548,059.23 and 215,854.00

Step by Step Solution

1. Step 1: Write the proportion equation
   397,142.01 : 548,059.23 = 215,854.00 : x
2. Step 2: Convert to fraction form
   397,142.01/548,059.23 = 215,854.00/x
3. Step 3: Cross multiply
   397,142.01x = 548,059.23 × 215,854.00
4. Step 4: Simplify right side
   397,142.01x = 118,300,775,662.27
5. Step 5: Solve for x
   x = 118,300,775,662.27/397,142.01
6. Step 6: Final answer
   x = 297,880.29