Finding the Fourth Proportional to 6,985.80, 9,640.35 and 3,841.98

Step by Step Solution

1. Step 1: Write the proportion equation
   6,985.80 : 9,640.35 = 3,841.98 : x
2. Step 2: Convert to fraction form
   6,985.80/9,640.35 = 3,841.98/x
3. Step 3: Cross multiply
   6,985.80x = 9,640.35 × 3,841.98
4. Step 4: Simplify right side
   6,985.80x = 37,038,031.89
5. Step 5: Solve for x
   x = 37,038,031.89/6,985.80
6. Step 6: Final answer
   x = 5,301.90