Finding the Fourth Proportional to 42,555.65, 63,872.82 and 21,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,555.65 : 63,872.82 = 21,510.50 : x
2. Step 2: Convert to fraction form
   42,555.65/63,872.82 = 21,510.50/x
3. Step 3: Cross multiply
   42,555.65x = 63,872.82 × 21,510.50
4. Step 4: Simplify right side
   42,555.65x = 1,373,935,975.25
5. Step 5: Solve for x
   x = 1,373,935,975.25/42,555.65
6. Step 6: Final answer
   x = 32,285.63