Finding the Fourth Proportional to 123,381.54, 170,293.50 and 78,119.88

Step by Step Solution

1. Step 1: Write the proportion equation
   123,381.54 : 170,293.50 = 78,119.88 : x
2. Step 2: Convert to fraction form
   123,381.54/170,293.50 = 78,119.88/x
3. Step 3: Cross multiply
   123,381.54x = 170,293.50 × 78,119.88
4. Step 4: Simplify right side
   123,381.54x = 13,303,307,784.78
5. Step 5: Solve for x
   x = 13,303,307,784.78/123,381.54
6. Step 6: Final answer
   x = 107,822.51