Finding the Fourth Proportional to 77,041.72, 106,331.52 and 49,851.28

Step by Step Solution

1. Step 1: Write the proportion equation
   77,041.72 : 106,331.52 = 49,851.28 : x
2. Step 2: Convert to fraction form
   77,041.72/106,331.52 = 49,851.28/x
3. Step 3: Cross multiply
   77,041.72x = 106,331.52 × 49,851.28
4. Step 4: Simplify right side
   77,041.72x = 5,300,762,376.35
5. Step 5: Solve for x
   x = 5,300,762,376.35/77,041.72
6. Step 6: Final answer
   x = 68,803.79