Finding the Fourth Proportional to 78,743.52, 117,998.60 and 64,802.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,743.52 : 117,998.60 = 64,802.61 : x
2. Step 2: Convert to fraction form
   78,743.52/117,998.60 = 64,802.61/x
3. Step 3: Cross multiply
   78,743.52x = 117,998.60 × 64,802.61
4. Step 4: Simplify right side
   78,743.52x = 7,646,616,932.33
5. Step 5: Solve for x
   x = 7,646,616,932.33/78,743.52
6. Step 6: Final answer
   x = 97,107.89