Finding the Fourth Proportional to 21,196.76, 31,800.80 and 7,345.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.76 : 31,800.80 = 7,345.76 : x
2. Step 2: Convert to fraction form
   21,196.76/31,800.80 = 7,345.76/x
3. Step 3: Cross multiply
   21,196.76x = 31,800.80 × 7,345.76
4. Step 4: Simplify right side
   21,196.76x = 233,601,044.61
5. Step 5: Solve for x
   x = 233,601,044.61/21,196.76
6. Step 6: Final answer
   x = 11,020.60