Finding the Fourth Proportional to 21,930.54, 32,892.16 and 7,887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.54 : 32,892.16 = 7,887.72 : x
2. Step 2: Convert to fraction form
   21,930.54/32,892.16 = 7,887.72/x
3. Step 3: Cross multiply
   21,930.54x = 32,892.16 × 7,887.72
4. Step 4: Simplify right side
   21,930.54x = 259,444,148.28
5. Step 5: Solve for x
   x = 259,444,148.28/21,930.54
6. Step 6: Final answer
   x = 11,830.27