Finding the Fourth Proportional to 81,834.18, 122,750.45 and 28,526.05

Step by Step Solution

1. Step 1: Write the proportion equation
   81,834.18 : 122,750.45 = 28,526.05 : x
2. Step 2: Convert to fraction form
   81,834.18/122,750.45 = 28,526.05/x
3. Step 3: Cross multiply
   81,834.18x = 122,750.45 × 28,526.05
4. Step 4: Simplify right side
   81,834.18x = 3,501,585,474.22
5. Step 5: Solve for x
   x = 3,501,585,474.22/81,834.18
6. Step 6: Final answer
   x = 42,788.79