Finding the Fourth Proportional to 60,413.19, 90,636.12 and 42,993.60

Step by Step Solution

1. Step 1: Write the proportion equation
   60,413.19 : 90,636.12 = 42,993.60 : x
2. Step 2: Convert to fraction form
   60,413.19/90,636.12 = 42,993.60/x
3. Step 3: Cross multiply
   60,413.19x = 90,636.12 × 42,993.60
4. Step 4: Simplify right side
   60,413.19x = 3,896,773,088.83
5. Step 5: Solve for x
   x = 3,896,773,088.83/60,413.19
6. Step 6: Final answer
   x = 64,502.02