Finding the Fourth Proportional to 77,719.14, 107,278.43 and 52,216.83

Step by Step Solution

1. Step 1: Write the proportion equation
   77,719.14 : 107,278.43 = 52,216.83 : x
2. Step 2: Convert to fraction form
   77,719.14/107,278.43 = 52,216.83/x
3. Step 3: Cross multiply
   77,719.14x = 107,278.43 × 52,216.83
4. Step 4: Simplify right side
   77,719.14x = 5,601,739,280.89
5. Step 5: Solve for x
   x = 5,601,739,280.89/77,719.14
6. Step 6: Final answer
   x = 72,076.70