Finding the Fourth Proportional to 110,978.10, 166,479.30 and 107,478.90

Step by Step Solution

1. Step 1: Write the proportion equation
   110,978.10 : 166,479.30 = 107,478.90 : x
2. Step 2: Convert to fraction form
   110,978.10/166,479.30 = 107,478.90/x
3. Step 3: Cross multiply
   110,978.10x = 166,479.30 × 107,478.90
4. Step 4: Simplify right side
   110,978.10x = 17,893,012,036.77
5. Step 5: Solve for x
   x = 17,893,012,036.77/110,978.10
6. Step 6: Final answer
   x = 161,230.12