Finding the Fourth Proportional to 77,152.32, 106,360.56 and 54,420.48

Step by Step Solution

1. Step 1: Write the proportion equation
   77,152.32 : 106,360.56 = 54,420.48 : x
2. Step 2: Convert to fraction form
   77,152.32/106,360.56 = 54,420.48/x
3. Step 3: Cross multiply
   77,152.32x = 106,360.56 × 54,420.48
4. Step 4: Simplify right side
   77,152.32x = 5,788,192,728.27
5. Step 5: Solve for x
   x = 5,788,192,728.27/77,152.32
6. Step 6: Final answer
   x = 75,022.93