Finding the Fourth Proportional to 42,700.84, 64,082.72 and 20,527

Step by Step Solution

1. Step 1: Write the proportion equation
   42,700.84 : 64,082.72 = 20,527 : x
2. Step 2: Convert to fraction form
   42,700.84/64,082.72 = 20,527/x
3. Step 3: Cross multiply
   42,700.84x = 64,082.72 × 20,527
4. Step 4: Simplify right side
   42,700.84x = 1,315,425,993.44
5. Step 5: Solve for x
   x = 1,315,425,993.44/42,700.84
6. Step 6: Final answer
   x = 30,805.62