Finding the Fourth Proportional to 11,870.30, 16,378.25 and 7,089.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.30 : 16,378.25 = 7,089.32 : x
2. Step 2: Convert to fraction form
   11,870.30/16,378.25 = 7,089.32/x
3. Step 3: Cross multiply
   11,870.30x = 16,378.25 × 7,089.32
4. Step 4: Simplify right side
   11,870.30x = 116,110,700.67
5. Step 5: Solve for x
   x = 116,110,700.67/11,870.30
6. Step 6: Final answer
   x = 9,781.62