Finding the Fourth Proportional to 123,978.16, 171,088.84 and 67,389.36

Step by Step Solution

1. Step 1: Write the proportion equation
   123,978.16 : 171,088.84 = 67,389.36 : x
2. Step 2: Convert to fraction form
   123,978.16/171,088.84 = 67,389.36/x
3. Step 3: Cross multiply
   123,978.16x = 171,088.84 × 67,389.36
4. Step 4: Simplify right side
   123,978.16x = 11,529,567,430.74
5. Step 5: Solve for x
   x = 11,529,567,430.74/123,978.16
6. Step 6: Final answer
   x = 92,996.76