Finding the Fourth Proportional to 11,120.31, 16,663.85 and 10,300.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,120.31 : 16,663.85 = 10,300.19 : x
2. Step 2: Convert to fraction form
   11,120.31/16,663.85 = 10,300.19/x
3. Step 3: Cross multiply
   11,120.31x = 16,663.85 × 10,300.19
4. Step 4: Simplify right side
   11,120.31x = 171,640,686.31
5. Step 5: Solve for x
   x = 171,640,686.31/11,120.31
6. Step 6: Final answer
   x = 15,434.88