Finding the Fourth Proportional to 21,930.57, 30,264.71 and 12,500.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.57 : 30,264.71 = 12,500.01 : x
2. Step 2: Convert to fraction form
   21,930.57/30,264.71 = 12,500.01/x
3. Step 3: Cross multiply
   21,930.57x = 30,264.71 × 12,500.01
4. Step 4: Simplify right side
   21,930.57x = 378,309,115.15
5. Step 5: Solve for x
   x = 378,309,115.15/21,930.57
6. Step 6: Final answer
   x = 17,250.31