Finding the Fourth Proportional to 81,859.42, 122,809.57 and 28,552.17

Step by Step Solution

1. Step 1: Write the proportion equation
   81,859.42 : 122,809.57 = 28,552.17 : x
2. Step 2: Convert to fraction form
   81,859.42/122,809.57 = 28,552.17/x
3. Step 3: Cross multiply
   81,859.42x = 122,809.57 × 28,552.17
4. Step 4: Simplify right side
   81,859.42x = 3,506,479,720.27
5. Step 5: Solve for x
   x = 3,506,479,720.27/81,859.42
6. Step 6: Final answer
   x = 42,835.38