Finding the Fourth Proportional to 81,948.42, 122,932.15 and 28,623.89

Step by Step Solution

1. Step 1: Write the proportion equation
   81,948.42 : 122,932.15 = 28,623.89 : x
2. Step 2: Convert to fraction form
   81,948.42/122,932.15 = 28,623.89/x
3. Step 3: Cross multiply
   81,948.42x = 122,932.15 × 28,623.89
4. Step 4: Simplify right side
   81,948.42x = 3,518,796,574.83
5. Step 5: Solve for x
   x = 3,518,796,574.83/81,948.42
6. Step 6: Final answer
   x = 42,939.16