Finding the Fourth Proportional to 112,413.18, 155,161.46 and 64,681.90

Step by Step Solution

1. Step 1: Write the proportion equation
   112,413.18 : 155,161.46 = 64,681.90 : x
2. Step 2: Convert to fraction form
   112,413.18/155,161.46 = 64,681.90/x
3. Step 3: Cross multiply
   112,413.18x = 155,161.46 × 64,681.90
4. Step 4: Simplify right side
   112,413.18x = 10,036,138,039.57
5. Step 5: Solve for x
   x = 10,036,138,039.57/112,413.18
6. Step 6: Final answer
   x = 89,279.02