Finding the Fourth Proportional to 442,026.56, 662,945.88 and 126,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   442,026.56 : 662,945.88 = 126,398.72 : x
2. Step 2: Convert to fraction form
   442,026.56/662,945.88 = 126,398.72/x
3. Step 3: Cross multiply
   442,026.56x = 662,945.88 × 126,398.72
4. Step 4: Simplify right side
   442,026.56x = 83,795,510,661.27
5. Step 5: Solve for x
   x = 83,795,510,661.27/442,026.56
6. Step 6: Final answer
   x = 189,571.21