Finding the Fourth Proportional to 120,978.78, 166,902.76 and 69,982.04

Step by Step Solution

1. Step 1: Write the proportion equation
   120,978.78 : 166,902.76 = 69,982.04 : x
2. Step 2: Convert to fraction form
   120,978.78/166,902.76 = 69,982.04/x
3. Step 3: Cross multiply
   120,978.78x = 166,902.76 × 69,982.04
4. Step 4: Simplify right side
   120,978.78x = 11,680,196,131.16
5. Step 5: Solve for x
   x = 11,680,196,131.16/120,978.78
6. Step 6: Final answer
   x = 96,547.48