Finding the Fourth Proportional to 21,074.79, 31,601.50 and 7,029.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,074.79 : 31,601.50 = 7,029.90 : x
2. Step 2: Convert to fraction form
   21,074.79/31,601.50 = 7,029.90/x
3. Step 3: Cross multiply
   21,074.79x = 31,601.50 × 7,029.90
4. Step 4: Simplify right side
   21,074.79x = 222,155,384.85
5. Step 5: Solve for x
   x = 222,155,384.85/21,074.79
6. Step 6: Final answer
   x = 10,541.29