Finding the Fourth Proportional to 78,029.06, 107,679.33 and 42,218.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,029.06 : 107,679.33 = 42,218.28 : x
2. Step 2: Convert to fraction form
   78,029.06/107,679.33 = 42,218.28/x
3. Step 3: Cross multiply
   78,029.06x = 107,679.33 × 42,218.28
4. Step 4: Simplify right side
   78,029.06x = 4,546,036,666.27
5. Step 5: Solve for x
   x = 4,546,036,666.27/78,029.06
6. Step 6: Final answer
   x = 58,260.82