Finding the Fourth Proportional to 11,978.25, 16,512.26 and 7,670.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.25 : 16,512.26 = 7,670.88 : x
2. Step 2: Convert to fraction form
   11,978.25/16,512.26 = 7,670.88/x
3. Step 3: Cross multiply
   11,978.25x = 16,512.26 × 7,670.88
4. Step 4: Simplify right side
   11,978.25x = 126,663,526.63
5. Step 5: Solve for x
   x = 126,663,526.63/11,978.25
6. Step 6: Final answer
   x = 10,574.46