Finding the Fourth Proportional to 78,196.50, 107,911.36 and 42,386.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,196.50 : 107,911.36 = 42,386.35 : x
2. Step 2: Convert to fraction form
   78,196.50/107,911.36 = 42,386.35/x
3. Step 3: Cross multiply
   78,196.50x = 107,911.36 × 42,386.35
4. Step 4: Simplify right side
   78,196.50x = 4,573,968,673.94
5. Step 5: Solve for x
   x = 4,573,968,673.94/78,196.50
6. Step 6: Final answer
   x = 58,493.27