Finding the Fourth Proportional to 21,010.30, 29,501.90 and 21,010.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,010.30 : 29,501.90 = 21,010.30 : x
2. Step 2: Convert to fraction form
   21,010.30/29,501.90 = 21,010.30/x
3. Step 3: Cross multiply
   21,010.30x = 29,501.90 × 21,010.30
4. Step 4: Simplify right side
   21,010.30x = 619,843,769.57
5. Step 5: Solve for x
   x = 619,843,769.57/21,010.30
6. Step 6: Final answer
   x = 29,501.90