Finding the Fourth Proportional to 78,924.50, 108,919.06 and 45,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,924.50 : 108,919.06 = 45,390.50 : x
2. Step 2: Convert to fraction form
   78,924.50/108,919.06 = 45,390.50/x
3. Step 3: Cross multiply
   78,924.50x = 108,919.06 × 45,390.50
4. Step 4: Simplify right side
   78,924.50x = 4,943,890,592.93
5. Step 5: Solve for x
   x = 4,943,890,592.93/78,924.50
6. Step 6: Final answer
   x = 62,640.76