Finding the Fourth Proportional to 42,766.67, 64,102.20 and 17,789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,766.67 : 64,102.20 = 17,789.72 : x
2. Step 2: Convert to fraction form
   42,766.67/64,102.20 = 17,789.72/x
3. Step 3: Cross multiply
   42,766.67x = 64,102.20 × 17,789.72
4. Step 4: Simplify right side
   42,766.67x = 1,140,359,868.87
5. Step 5: Solve for x
   x = 1,140,359,868.87/42,766.67
6. Step 6: Final answer
   x = 26,664.69