Finding the Fourth Proportional to 156,061.20, 233,746.20 and 128,413.20

Step by Step Solution

1. Step 1: Write the proportion equation
   156,061.20 : 233,746.20 = 128,413.20 : x
2. Step 2: Convert to fraction form
   156,061.20/233,746.20 = 128,413.20/x
3. Step 3: Cross multiply
   156,061.20x = 233,746.20 × 128,413.20
4. Step 4: Simplify right side
   156,061.20x = 30,016,097,529.84
5. Step 5: Solve for x
   x = 30,016,097,529.84/156,061.20
6. Step 6: Final answer
   x = 192,335.43