Finding the Fourth Proportional to 54,478.16, 81,675.72 and 28,166.12

Step by Step Solution

1. Step 1: Write the proportion equation
   54,478.16 : 81,675.72 = 28,166.12 : x
2. Step 2: Convert to fraction form
   54,478.16/81,675.72 = 28,166.12/x
3. Step 3: Cross multiply
   54,478.16x = 81,675.72 × 28,166.12
4. Step 4: Simplify right side
   54,478.16x = 2,300,488,130.61
5. Step 5: Solve for x
   x = 2,300,488,130.61/54,478.16
6. Step 6: Final answer
   x = 42,227.71