Finding the Fourth Proportional to 42,828.05, 64,315.58 and 26,285.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,828.05 : 64,315.58 = 26,285.22 : x
2. Step 2: Convert to fraction form
   42,828.05/64,315.58 = 26,285.22/x
3. Step 3: Cross multiply
   42,828.05x = 64,315.58 × 26,285.22
4. Step 4: Simplify right side
   42,828.05x = 1,690,549,038.30
5. Step 5: Solve for x
   x = 1,690,549,038.30/42,828.05
6. Step 6: Final answer
   x = 39,472.94