Finding the Fourth Proportional to 78,063.94, 107,657.40 and 51,196.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,063.94 : 107,657.40 = 51,196.78 : x
2. Step 2: Convert to fraction form
   78,063.94/107,657.40 = 51,196.78/x
3. Step 3: Cross multiply
   78,063.94x = 107,657.40 × 51,196.78
4. Step 4: Simplify right side
   78,063.94x = 5,511,712,223.17
5. Step 5: Solve for x
   x = 5,511,712,223.17/78,063.94
6. Step 6: Final answer
   x = 70,605.10