Finding the Fourth Proportional to 10,870.10, 16,314.45 and 10,788.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870.10 : 16,314.45 = 10,788.28 : x
2. Step 2: Convert to fraction form
   10,870.10/16,314.45 = 10,788.28/x
3. Step 3: Cross multiply
   10,870.10x = 16,314.45 × 10,788.28
4. Step 4: Simplify right side
   10,870.10x = 176,004,854.65
5. Step 5: Solve for x
   x = 176,004,854.65/10,870.10
6. Step 6: Final answer
   x = 16,191.65