Finding the Fourth Proportional to 83,763.23, 115,499.42 and 78,448.82

Step by Step Solution

1. Step 1: Write the proportion equation
   83,763.23 : 115,499.42 = 78,448.82 : x
2. Step 2: Convert to fraction form
   83,763.23/115,499.42 = 78,448.82/x
3. Step 3: Cross multiply
   83,763.23x = 115,499.42 × 78,448.82
4. Step 4: Simplify right side
   83,763.23x = 9,060,792,828.31
5. Step 5: Solve for x
   x = 9,060,792,828.31/83,763.23
6. Step 6: Final answer
   x = 108,171.49