Finding the Fourth Proportional to 485,139.72, 727,404.18 and 148,068.24

Step by Step Solution

1. Step 1: Write the proportion equation
   485,139.72 : 727,404.18 = 148,068.24 : x
2. Step 2: Convert to fraction form
   485,139.72/727,404.18 = 148,068.24/x
3. Step 3: Cross multiply
   485,139.72x = 727,404.18 × 148,068.24
4. Step 4: Simplify right side
   485,139.72x = 107,705,456,701.24
5. Step 5: Solve for x
   x = 107,705,456,701.24/485,139.72
6. Step 6: Final answer
   x = 222,009.15