Finding the Fourth Proportional to 78,764.60, 118,072.15 and 31,408.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,764.60 : 118,072.15 = 31,408.76 : x
2. Step 2: Convert to fraction form
   78,764.60/118,072.15 = 31,408.76/x
3. Step 3: Cross multiply
   78,764.60x = 118,072.15 × 31,408.76
4. Step 4: Simplify right side
   78,764.60x = 3,708,500,038.69
5. Step 5: Solve for x
   x = 3,708,500,038.69/78,764.60
6. Step 6: Final answer
   x = 47,083.33