Finding the Fourth Proportional to 21,914.47, 30,242.51 and 13,300.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,914.47 : 30,242.51 = 13,300.75 : x
2. Step 2: Convert to fraction form
   21,914.47/30,242.51 = 13,300.75/x
3. Step 3: Cross multiply
   21,914.47x = 30,242.51 × 13,300.75
4. Step 4: Simplify right side
   21,914.47x = 402,248,064.88
5. Step 5: Solve for x
   x = 402,248,064.88/21,914.47
6. Step 6: Final answer
   x = 18,355.36