Finding the Fourth Proportional to 78,119.80, 107,804.78 and 42,308.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,119.80 : 107,804.78 = 42,308.99 : x
2. Step 2: Convert to fraction form
   78,119.80/107,804.78 = 42,308.99/x
3. Step 3: Cross multiply
   78,119.80x = 107,804.78 × 42,308.99
4. Step 4: Simplify right side
   78,119.80x = 4,561,110,608.40
5. Step 5: Solve for x
   x = 4,561,110,608.40/78,119.80
6. Step 6: Final answer
   x = 58,386.10