Finding the Fourth Proportional to 78,039.57, 107,690.88 and 45,769.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,039.57 : 107,690.88 = 45,769.78 : x
2. Step 2: Convert to fraction form
   78,039.57/107,690.88 = 45,769.78/x
3. Step 3: Cross multiply
   78,039.57x = 107,690.88 × 45,769.78
4. Step 4: Simplify right side
   78,039.57x = 4,928,987,885.61
5. Step 5: Solve for x
   x = 4,928,987,885.61/78,039.57
6. Step 6: Final answer
   x = 63,160.11