Finding the Fourth Proportional to 78,991.01, 108,937.01 and 65,540.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,991.01 : 108,937.01 = 65,540.96 : x
2. Step 2: Convert to fraction form
   78,991.01/108,937.01 = 65,540.96/x
3. Step 3: Cross multiply
   78,991.01x = 108,937.01 × 65,540.96
4. Step 4: Simplify right side
   78,991.01x = 7,139,835,342.54
5. Step 5: Solve for x
   x = 7,139,835,342.54/78,991.01
6. Step 6: Final answer
   x = 90,387.95