Finding the Fourth Proportional to 80,779.06, 121,160.00 and 21,620.71

Step by Step Solution

1. Step 1: Write the proportion equation
   80,779.06 : 121,160.00 = 21,620.71 : x
2. Step 2: Convert to fraction form
   80,779.06/121,160.00 = 21,620.71/x
3. Step 3: Cross multiply
   80,779.06x = 121,160.00 × 21,620.71
4. Step 4: Simplify right side
   80,779.06x = 2,619,565,115.50
5. Step 5: Solve for x
   x = 2,619,565,115.50/80,779.06
6. Step 6: Final answer
   x = 32,428.76