Finding the Fourth Proportional to 77,871.36, 107,462.40 and 42,061.36

Step by Step Solution

1. Step 1: Write the proportion equation
   77,871.36 : 107,462.40 = 42,061.36 : x
2. Step 2: Convert to fraction form
   77,871.36/107,462.40 = 42,061.36/x
3. Step 3: Cross multiply
   77,871.36x = 107,462.40 × 42,061.36
4. Step 4: Simplify right side
   77,871.36x = 4,520,014,692.86
5. Step 5: Solve for x
   x = 4,520,014,692.86/77,871.36
6. Step 6: Final answer
   x = 58,044.64