Finding the Fourth Proportional to 78,667.66, 108,560.83 and 42,857.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,667.66 : 108,560.83 = 42,857.70 : x
2. Step 2: Convert to fraction form
   78,667.66/108,560.83 = 42,857.70/x
3. Step 3: Cross multiply
   78,667.66x = 108,560.83 × 42,857.70
4. Step 4: Simplify right side
   78,667.66x = 4,652,667,483.89
5. Step 5: Solve for x
   x = 4,652,667,483.89/78,667.66
6. Step 6: Final answer
   x = 59,143.33