Finding the Fourth Proportional to 78,518.83, 108,309.81 and 49,400.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,518.83 : 108,309.81 = 49,400.89 : x
2. Step 2: Convert to fraction form
   78,518.83/108,309.81 = 49,400.89/x
3. Step 3: Cross multiply
   78,518.83x = 108,309.81 × 49,400.89
4. Step 4: Simplify right side
   78,518.83x = 5,350,601,009.73
5. Step 5: Solve for x
   x = 5,350,601,009.73/78,518.83
6. Step 6: Final answer
   x = 68,144.18