Finding the Fourth Proportional to 81,111.34, 121,673.40 and 28,532.62

Step by Step Solution

1. Step 1: Write the proportion equation
   81,111.34 : 121,673.40 = 28,532.62 : x
2. Step 2: Convert to fraction form
   81,111.34/121,673.40 = 28,532.62/x
3. Step 3: Cross multiply
   81,111.34x = 121,673.40 × 28,532.62
4. Step 4: Simplify right side
   81,111.34x = 3,471,660,886.31
5. Step 5: Solve for x
   x = 3,471,660,886.31/81,111.34
6. Step 6: Final answer
   x = 42,801.18