Finding the Fourth Proportional to 11,151, 16,729.32 and 7,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,151 : 16,729.32 = 7,870.50 : x
2. Step 2: Convert to fraction form
   11,151/16,729.32 = 7,870.50/x
3. Step 3: Cross multiply
   11,151x = 16,729.32 × 7,870.50
4. Step 4: Simplify right side
   11,151x = 131,668,113.06
5. Step 5: Solve for x
   x = 131,668,113.06/11,151
6. Step 6: Final answer
   x = 11,807.74