Finding the Fourth Proportional to 78,012.72, 107,649 and 44,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,012.72 : 107,649 = 44,478.72 : x
2. Step 2: Convert to fraction form
   78,012.72/107,649 = 44,478.72/x
3. Step 3: Cross multiply
   78,012.72x = 107,649 × 44,478.72
4. Step 4: Simplify right side
   78,012.72x = 4,788,089,729.28
5. Step 5: Solve for x
   x = 4,788,089,729.28/78,012.72
6. Step 6: Final answer
   x = 61,375.76