Finding the Fourth Proportional to 21,773.38, 30,047.79 and 13,275.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,773.38 : 30,047.79 = 13,275.94 : x
2. Step 2: Convert to fraction form
   21,773.38/30,047.79 = 13,275.94/x
3. Step 3: Cross multiply
   21,773.38x = 30,047.79 × 13,275.94
4. Step 4: Simplify right side
   21,773.38x = 398,912,657.17
5. Step 5: Solve for x
   x = 398,912,657.17/21,773.38
6. Step 6: Final answer
   x = 18,321.12