Finding the Fourth Proportional to 123,972, 171,080.72 and 67,383.68

Step by Step Solution

1. Step 1: Write the proportion equation
   123,972 : 171,080.72 = 67,383.68 : x
2. Step 2: Convert to fraction form
   123,972/171,080.72 = 67,383.68/x
3. Step 3: Cross multiply
   123,972x = 171,080.72 × 67,383.68
4. Step 4: Simplify right side
   123,972x = 11,528,048,490.65
5. Step 5: Solve for x
   x = 11,528,048,490.65/123,972
6. Step 6: Final answer
   x = 92,989.13