Finding the Fourth Proportional to 21,035.48, 31,558.31 and 7,887.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,035.48 : 31,558.31 = 7,887.97 : x
2. Step 2: Convert to fraction form
   21,035.48/31,558.31 = 7,887.97/x
3. Step 3: Cross multiply
   21,035.48x = 31,558.31 × 7,887.97
4. Step 4: Simplify right side
   21,035.48x = 248,931,002.53
5. Step 5: Solve for x
   x = 248,931,002.53/21,035.48
6. Step 6: Final answer
   x = 11,833.86