Finding the Fourth Proportional to 78,675.42, 108,572.67 and 42,866.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,675.42 : 108,572.67 = 42,866.40 : x
2. Step 2: Convert to fraction form
   78,675.42/108,572.67 = 42,866.40/x
3. Step 3: Cross multiply
   78,675.42x = 108,572.67 × 42,866.40
4. Step 4: Simplify right side
   78,675.42x = 4,654,119,501.29
5. Step 5: Solve for x
   x = 4,654,119,501.29/78,675.42
6. Step 6: Final answer
   x = 59,155.95