Finding the Fourth Proportional to 59,085.79, 88,641.88 and 21,645.09

Step by Step Solution

1. Step 1: Write the proportion equation
   59,085.79 : 88,641.88 = 21,645.09 : x
2. Step 2: Convert to fraction form
   59,085.79/88,641.88 = 21,645.09/x
3. Step 3: Cross multiply
   59,085.79x = 88,641.88 × 21,645.09
4. Step 4: Simplify right side
   59,085.79x = 1,918,661,416.26
5. Step 5: Solve for x
   x = 1,918,661,416.26/59,085.79
6. Step 6: Final answer
   x = 32,472.47