Finding the Fourth Proportional to 42,488.72, 63,685 and 21,395.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,488.72 : 63,685 = 21,395.24 : x
2. Step 2: Convert to fraction form
   42,488.72/63,685 = 21,395.24/x
3. Step 3: Cross multiply
   42,488.72x = 63,685 × 21,395.24
4. Step 4: Simplify right side
   42,488.72x = 1,362,555,859.40
5. Step 5: Solve for x
   x = 1,362,555,859.40/42,488.72
6. Step 6: Final answer
   x = 32,068.65