Finding the Fourth Proportional to 42,832.56, 64,322.34 and 26,289.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,832.56 : 64,322.34 = 26,289.72 : x
2. Step 2: Convert to fraction form
   42,832.56/64,322.34 = 26,289.72/x
3. Step 3: Cross multiply
   42,832.56x = 64,322.34 × 26,289.72
4. Step 4: Simplify right side
   42,832.56x = 1,691,016,308.34
5. Step 5: Solve for x
   x = 1,691,016,308.34/42,832.56
6. Step 6: Final answer
   x = 39,479.69