Finding the Fourth Proportional to 103,695.35, 155,707.05 and 78,763.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103,695.35 : 155,707.05 = 78,763.55 : x
2. Step 2: Convert to fraction form
   103,695.35/155,707.05 = 78,763.55/x
3. Step 3: Cross multiply
   103,695.35x = 155,707.05 × 78,763.55
4. Step 4: Simplify right side
   103,695.35x = 12,264,040,018.03
5. Step 5: Solve for x
   x = 12,264,040,018.03/103,695.35
6. Step 6: Final answer
   x = 118,269.91