Finding the Fourth Proportional to 7,021.89, 10,535.67 and 3,123.63

Step by Step Solution

1. Step 1: Write the proportion equation
   7,021.89 : 10,535.67 = 3,123.63 : x
2. Step 2: Convert to fraction form
   7,021.89/10,535.67 = 3,123.63/x
3. Step 3: Cross multiply
   7,021.89x = 10,535.67 × 3,123.63
4. Step 4: Simplify right side
   7,021.89x = 32,909,534.88
5. Step 5: Solve for x
   x = 32,909,534.88/7,021.89
6. Step 6: Final answer
   x = 4,686.71