Finding the Fourth Proportional to 28,585.48, 42,798.98 and 21,544.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,585.48 : 42,798.98 = 21,544.18 : x
2. Step 2: Convert to fraction form
   28,585.48/42,798.98 = 21,544.18/x
3. Step 3: Cross multiply
   28,585.48x = 42,798.98 × 21,544.18
4. Step 4: Simplify right side
   28,585.48x = 922,068,928.94
5. Step 5: Solve for x
   x = 922,068,928.94/28,585.48
6. Step 6: Final answer
   x = 32,256.55