Finding the Fourth Proportional to 42,865.20, 64,300.32 and 16,570.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,865.20 : 64,300.32 = 16,570.08 : x
2. Step 2: Convert to fraction form
   42,865.20/64,300.32 = 16,570.08/x
3. Step 3: Cross multiply
   42,865.20x = 64,300.32 × 16,570.08
4. Step 4: Simplify right side
   42,865.20x = 1,065,461,446.43
5. Step 5: Solve for x
   x = 1,065,461,446.43/42,865.20
6. Step 6: Final answer
   x = 24,856.09