Finding the Fourth Proportional to 78,031.41, 107,682.57 and 42,220.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,031.41 : 107,682.57 = 42,220.62 : x
2. Step 2: Convert to fraction form
   78,031.41/107,682.57 = 42,220.62/x
3. Step 3: Cross multiply
   78,031.41x = 107,682.57 × 42,220.62
4. Step 4: Simplify right side
   78,031.41x = 4,546,424,868.59
5. Step 5: Solve for x
   x = 4,546,424,868.59/78,031.41
6. Step 6: Final answer
   x = 58,264.04