Finding the Fourth Proportional to 42,780.86, 64,182.22 and 17,812.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,780.86 : 64,182.22 = 17,812.61 : x
2. Step 2: Convert to fraction form
   42,780.86/64,182.22 = 17,812.61/x
3. Step 3: Cross multiply
   42,780.86x = 64,182.22 × 17,812.61
4. Step 4: Simplify right side
   42,780.86x = 1,143,252,853.79
5. Step 5: Solve for x
   x = 1,143,252,853.79/42,780.86
6. Step 6: Final answer
   x = 26,723.47