Finding the Fourth Proportional to 9,978.62, 14,967.12 and 3,893.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.62 : 14,967.12 = 3,893.36 : x
2. Step 2: Convert to fraction form
   9,978.62/14,967.12 = 3,893.36/x
3. Step 3: Cross multiply
   9,978.62x = 14,967.12 × 3,893.36
4. Step 4: Simplify right side
   9,978.62x = 58,272,386.32
5. Step 5: Solve for x
   x = 58,272,386.32/9,978.62
6. Step 6: Final answer
   x = 5,839.72