Finding the Fourth Proportional to 11,984, 17,978.88 and 3,776

Step by Step Solution

1. Step 1: Write the proportion equation
   11,984 : 17,978.88 = 3,776 : x
2. Step 2: Convert to fraction form
   11,984/17,978.88 = 3,776/x
3. Step 3: Cross multiply
   11,984x = 17,978.88 × 3,776
4. Step 4: Simplify right side
   11,984x = 67,888,250.88
5. Step 5: Solve for x
   x = 67,888,250.88/11,984
6. Step 6: Final answer
   x = 5,664.91