Finding the Fourth Proportional to 78,119.58, 107,804.40 and 42,308.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,119.58 : 107,804.40 = 42,308.76 : x
2. Step 2: Convert to fraction form
   78,119.58/107,804.40 = 42,308.76/x
3. Step 3: Cross multiply
   78,119.58x = 107,804.40 × 42,308.76
4. Step 4: Simplify right side
   78,119.58x = 4,561,070,486.54
5. Step 5: Solve for x
   x = 4,561,070,486.54/78,119.58
6. Step 6: Final answer
   x = 58,385.75