Finding the Fourth Proportional to 21,271.74, 31,901.12 and 7,417.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,271.74 : 31,901.12 = 7,417.50 : x
2. Step 2: Convert to fraction form
   21,271.74/31,901.12 = 7,417.50/x
3. Step 3: Cross multiply
   21,271.74x = 31,901.12 × 7,417.50
4. Step 4: Simplify right side
   21,271.74x = 236,626,557.60
5. Step 5: Solve for x
   x = 236,626,557.60/21,271.74
6. Step 6: Final answer
   x = 11,123.99