Finding the Fourth Proportional to 81,064.34, 121,608.69 and 28,464.56

Step by Step Solution

1. Step 1: Write the proportion equation
   81,064.34 : 121,608.69 = 28,464.56 : x
2. Step 2: Convert to fraction form
   81,064.34/121,608.69 = 28,464.56/x
3. Step 3: Cross multiply
   81,064.34x = 121,608.69 × 28,464.56
4. Step 4: Simplify right side
   81,064.34x = 3,461,537,853.03
5. Step 5: Solve for x
   x = 3,461,537,853.03/81,064.34
6. Step 6: Final answer
   x = 42,701.12