Finding the Fourth Proportional to 78,196.69, 107,911.56 and 42,386.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,196.69 : 107,911.56 = 42,386.68 : x
2. Step 2: Convert to fraction form
   78,196.69/107,911.56 = 42,386.68/x
3. Step 3: Cross multiply
   78,196.69x = 107,911.56 × 42,386.68
4. Step 4: Simplify right side
   78,196.69x = 4,574,012,762.02
5. Step 5: Solve for x
   x = 4,574,012,762.02/78,196.69
6. Step 6: Final answer
   x = 58,493.69