Finding the Fourth Proportional to 42,715.32, 64,045.38 and 17,772.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,715.32 : 64,045.38 = 17,772.56 : x
2. Step 2: Convert to fraction form
   42,715.32/64,045.38 = 17,772.56/x
3. Step 3: Cross multiply
   42,715.32x = 64,045.38 × 17,772.56
4. Step 4: Simplify right side
   42,715.32x = 1,138,250,358.77
5. Step 5: Solve for x
   x = 1,138,250,358.77/42,715.32
6. Step 6: Final answer
   x = 26,647.36