Finding the Fourth Proportional to 72,081.96, 98,608.63 and 71,778.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,081.96 : 98,608.63 = 71,778.36 : x
2. Step 2: Convert to fraction form
   72,081.96/98,608.63 = 71,778.36/x
3. Step 3: Cross multiply
   72,081.96x = 98,608.63 × 71,778.36
4. Step 4: Simplify right side
   72,081.96x = 7,077,965,070.76
5. Step 5: Solve for x
   x = 7,077,965,070.76/72,081.96
6. Step 6: Final answer
   x = 98,193.30