Finding the Fourth Proportional to 78,324.72, 108,008.72 and 67,031.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,324.72 : 108,008.72 = 67,031.76 : x
2. Step 2: Convert to fraction form
   78,324.72/108,008.72 = 67,031.76/x
3. Step 3: Cross multiply
   78,324.72x = 108,008.72 × 67,031.76
4. Step 4: Simplify right side
   78,324.72x = 7,240,014,596.95
5. Step 5: Solve for x
   x = 7,240,014,596.95/78,324.72
6. Step 6: Final answer
   x = 92,435.88