Finding the Fourth Proportional to 21,200.22, 31,800.47 and 7,345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,200.22 : 31,800.47 = 7,345.98 : x
2. Step 2: Convert to fraction form
   21,200.22/31,800.47 = 7,345.98/x
3. Step 3: Cross multiply
   21,200.22x = 31,800.47 × 7,345.98
4. Step 4: Simplify right side
   21,200.22x = 233,605,616.61
5. Step 5: Solve for x
   x = 233,605,616.61/21,200.22
6. Step 6: Final answer
   x = 11,019.02