Finding the Fourth Proportional to 42,834.56, 64,325.34 and 26,291.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,834.56 : 64,325.34 = 26,291.72 : x
2. Step 2: Convert to fraction form
   42,834.56/64,325.34 = 26,291.72/x
3. Step 3: Cross multiply
   42,834.56x = 64,325.34 × 26,291.72
4. Step 4: Simplify right side
   42,834.56x = 1,691,223,828.18
5. Step 5: Solve for x
   x = 1,691,223,828.18/42,834.56
6. Step 6: Final answer
   x = 39,482.69