Finding the Fourth Proportional to 81,587.16, 122,380.71 and 28,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,587.16 : 122,380.71 = 28,998.72 : x
2. Step 2: Convert to fraction form
   81,587.16/122,380.71 = 28,998.72/x
3. Step 3: Cross multiply
   81,587.16x = 122,380.71 × 28,998.72
4. Step 4: Simplify right side
   81,587.16x = 3,548,883,942.69
5. Step 5: Solve for x
   x = 3,548,883,942.69/81,587.16
6. Step 6: Final answer
   x = 43,498.07