Finding the Fourth Proportional to 78,231.60, 107,960.04 and 42,421.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,231.60 : 107,960.04 = 42,421.37 : x
2. Step 2: Convert to fraction form
   78,231.60/107,960.04 = 42,421.37/x
3. Step 3: Cross multiply
   78,231.60x = 107,960.04 × 42,421.37
4. Step 4: Simplify right side
   78,231.60x = 4,579,812,262.25
5. Step 5: Solve for x
   x = 4,579,812,262.25/78,231.60
6. Step 6: Final answer
   x = 58,541.72