Finding the Fourth Proportional to 77,144.83, 106,469.72 and 43,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   77,144.83 : 106,469.72 = 43,155.20 : x
2. Step 2: Convert to fraction form
   77,144.83/106,469.72 = 43,155.20/x
3. Step 3: Cross multiply
   77,144.83x = 106,469.72 × 43,155.20
4. Step 4: Simplify right side
   77,144.83x = 4,594,722,060.54
5. Step 5: Solve for x
   x = 4,594,722,060.54/77,144.83
6. Step 6: Final answer
   x = 59,559.69