Finding the Fourth Proportional to 56,413.50, 77,850.63 and 30,920.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,413.50 : 77,850.63 = 30,920.69 : x
2. Step 2: Convert to fraction form
   56,413.50/77,850.63 = 30,920.69/x
3. Step 3: Cross multiply
   56,413.50x = 77,850.63 × 30,920.69
4. Step 4: Simplify right side
   56,413.50x = 2,407,194,807.28
5. Step 5: Solve for x
   x = 2,407,194,807.28/56,413.50
6. Step 6: Final answer
   x = 42,670.55