Finding the Fourth Proportional to 120,971, 166,939.98 and 67,979

Step by Step Solution

1. Step 1: Write the proportion equation
   120,971 : 166,939.98 = 67,979 : x
2. Step 2: Convert to fraction form
   120,971/166,939.98 = 67,979/x
3. Step 3: Cross multiply
   120,971x = 166,939.98 × 67,979
4. Step 4: Simplify right side
   120,971x = 11,348,412,900.42
5. Step 5: Solve for x
   x = 11,348,412,900.42/120,971
6. Step 6: Final answer
   x = 93,811.02