Finding the Fourth Proportional to 123,985.64, 171,100.78 and 67,397

Step by Step Solution

1. Step 1: Write the proportion equation
   123,985.64 : 171,100.78 = 67,397 : x
2. Step 2: Convert to fraction form
   123,985.64/171,100.78 = 67,397/x
3. Step 3: Cross multiply
   123,985.64x = 171,100.78 × 67,397
4. Step 4: Simplify right side
   123,985.64x = 11,531,679,269.66
5. Step 5: Solve for x
   x = 11,531,679,269.66/123,985.64
6. Step 6: Final answer
   x = 93,008.18