Finding the Fourth Proportional to 123,532.38, 170,384.67 and 78,217.74

Step by Step Solution

1. Step 1: Write the proportion equation
   123,532.38 : 170,384.67 = 78,217.74 : x
2. Step 2: Convert to fraction form
   123,532.38/170,384.67 = 78,217.74/x
3. Step 3: Cross multiply
   123,532.38x = 170,384.67 × 78,217.74
4. Step 4: Simplify right side
   123,532.38x = 13,327,103,818.05
5. Step 5: Solve for x
   x = 13,327,103,818.05/123,532.38
6. Step 6: Final answer
   x = 107,883.49