Finding the Fourth Proportional to 78,777.64, 108,706.98 and 42,965.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,777.64 : 108,706.98 = 42,965.56 : x
2. Step 2: Convert to fraction form
   78,777.64/108,706.98 = 42,965.56/x
3. Step 3: Cross multiply
   78,777.64x = 108,706.98 × 42,965.56
4. Step 4: Simplify right side
   78,777.64x = 4,670,656,271.61
5. Step 5: Solve for x
   x = 4,670,656,271.61/78,777.64
6. Step 6: Final answer
   x = 59,289.11