Finding the Fourth Proportional to 11,978.32, 16,530.96 and 7,798.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.32 : 16,530.96 = 7,798.72 : x
2. Step 2: Convert to fraction form
   11,978.32/16,530.96 = 7,798.72/x
3. Step 3: Cross multiply
   11,978.32x = 16,530.96 × 7,798.72
4. Step 4: Simplify right side
   11,978.32x = 128,920,328.37
5. Step 5: Solve for x
   x = 128,920,328.37/11,978.32
6. Step 6: Final answer
   x = 10,762.81