Finding the Fourth Proportional to 78,231.04, 107,958.24 and 42,421.00

Step by Step Solution

1. Step 1: Write the proportion equation
   78,231.04 : 107,958.24 = 42,421.00 : x
2. Step 2: Convert to fraction form
   78,231.04/107,958.24 = 42,421.00/x
3. Step 3: Cross multiply
   78,231.04x = 107,958.24 × 42,421.00
4. Step 4: Simplify right side
   78,231.04x = 4,579,695,959.25
5. Step 5: Solve for x
   x = 4,579,695,959.25/78,231.04
6. Step 6: Final answer
   x = 58,540.65