Finding the Fourth Proportional to 78,486.57, 108,310.72 and 42,676.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,486.57 : 108,310.72 = 42,676.88 : x
2. Step 2: Convert to fraction form
   78,486.57/108,310.72 = 42,676.88/x
3. Step 3: Cross multiply
   78,486.57x = 108,310.72 × 42,676.88
4. Step 4: Simplify right side
   78,486.57x = 4,622,363,031.93
5. Step 5: Solve for x
   x = 4,622,363,031.93/78,486.57
6. Step 6: Final answer
   x = 58,893.68