Finding the Fourth Proportional to 123,977.42, 171,089.46 and 67,388.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,977.42 : 171,089.46 = 67,388.78 : x
2. Step 2: Convert to fraction form
   123,977.42/171,089.46 = 67,388.78/x
3. Step 3: Cross multiply
   123,977.42x = 171,089.46 × 67,388.78
4. Step 4: Simplify right side
   123,977.42x = 11,529,509,980.26
5. Step 5: Solve for x
   x = 11,529,509,980.26/123,977.42
6. Step 6: Final answer
   x = 92,996.85