Finding the Fourth Proportional to 7,031.84, 9,703.89 and 3,888

Step by Step Solution

1. Step 1: Write the proportion equation
   7,031.84 : 9,703.89 = 3,888 : x
2. Step 2: Convert to fraction form
   7,031.84/9,703.89 = 3,888/x
3. Step 3: Cross multiply
   7,031.84x = 9,703.89 × 3,888
4. Step 4: Simplify right side
   7,031.84x = 37,728,724.32
5. Step 5: Solve for x
   x = 37,728,724.32/7,031.84
6. Step 6: Final answer
   x = 5,365.42