Finding the Fourth Proportional to 77,178.42, 106,404.12 and 55,650.15

Step by Step Solution

1. Step 1: Write the proportion equation
   77,178.42 : 106,404.12 = 55,650.15 : x
2. Step 2: Convert to fraction form
   77,178.42/106,404.12 = 55,650.15/x
3. Step 3: Cross multiply
   77,178.42x = 106,404.12 × 55,650.15
4. Step 4: Simplify right side
   77,178.42x = 5,921,405,238.62
5. Step 5: Solve for x
   x = 5,921,405,238.62/77,178.42
6. Step 6: Final answer
   x = 76,723.59