Finding the Fourth Proportional to 56,821.50, 78,413.67 and 31,671

Step by Step Solution

1. Step 1: Write the proportion equation
   56,821.50 : 78,413.67 = 31,671 : x
2. Step 2: Convert to fraction form
   56,821.50/78,413.67 = 31,671/x
3. Step 3: Cross multiply
   56,821.50x = 78,413.67 × 31,671
4. Step 4: Simplify right side
   56,821.50x = 2,483,439,342.57
5. Step 5: Solve for x
   x = 2,483,439,342.57/56,821.50
6. Step 6: Final answer
   x = 43,705.98