Finding the Fourth Proportional to 156,736.28, 216,357.72 and 105,779

Step by Step Solution

1. Step 1: Write the proportion equation
   156,736.28 : 216,357.72 = 105,779 : x
2. Step 2: Convert to fraction form
   156,736.28/216,357.72 = 105,779/x
3. Step 3: Cross multiply
   156,736.28x = 216,357.72 × 105,779
4. Step 4: Simplify right side
   156,736.28x = 22,886,103,263.88
5. Step 5: Solve for x
   x = 22,886,103,263.88/156,736.28
6. Step 6: Final answer
   x = 146,016.63