Finding the Fourth Proportional to 78,665.96, 108,558.54 and 42,855.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,665.96 : 108,558.54 = 42,855.88 : x
2. Step 2: Convert to fraction form
   78,665.96/108,558.54 = 42,855.88/x
3. Step 3: Cross multiply
   78,665.96x = 108,558.54 × 42,855.88
4. Step 4: Simplify right side
   78,665.96x = 4,652,371,763.22
5. Step 5: Solve for x
   x = 4,652,371,763.22/78,665.96
6. Step 6: Final answer
   x = 59,140.85