Finding the Fourth Proportional to 53,705.94, 80,521.86 and 21,665.18

Step by Step Solution

1. Step 1: Write the proportion equation
   53,705.94 : 80,521.86 = 21,665.18 : x
2. Step 2: Convert to fraction form
   53,705.94/80,521.86 = 21,665.18/x
3. Step 3: Cross multiply
   53,705.94x = 80,521.86 × 21,665.18
4. Step 4: Simplify right side
   53,705.94x = 1,744,520,590.83
5. Step 5: Solve for x
   x = 1,744,520,590.83/53,705.94
6. Step 6: Final answer
   x = 32,482.82