Finding the Fourth Proportional to 78,686.66, 108,588.83 and 42,876.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,686.66 : 108,588.83 = 42,876.65 : x
2. Step 2: Convert to fraction form
   78,686.66/108,588.83 = 42,876.65/x
3. Step 3: Cross multiply
   78,686.66x = 108,588.83 × 42,876.65
4. Step 4: Simplify right side
   78,686.66x = 4,655,924,500.49
5. Step 5: Solve for x
   x = 4,655,924,500.49/78,686.66
6. Step 6: Final answer
   x = 59,170.45