Finding the Fourth Proportional to 79,977.78, 120,039.37 and 42,569.15

Step by Step Solution

1. Step 1: Write the proportion equation
   79,977.78 : 120,039.37 = 42,569.15 : x
2. Step 2: Convert to fraction form
   79,977.78/120,039.37 = 42,569.15/x
3. Step 3: Cross multiply
   79,977.78x = 120,039.37 × 42,569.15
4. Step 4: Simplify right side
   79,977.78x = 5,109,973,240.82
5. Step 5: Solve for x
   x = 5,109,973,240.82/79,977.78
6. Step 6: Final answer
   x = 63,892.41