Finding the Fourth Proportional to 9,985.01, 14,978.87 and 3,409.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,985.01 : 14,978.87 = 3,409.43 : x
2. Step 2: Convert to fraction form
   9,985.01/14,978.87 = 3,409.43/x
3. Step 3: Cross multiply
   9,985.01x = 14,978.87 × 3,409.43
4. Step 4: Simplify right side
   9,985.01x = 51,069,316.80
5. Step 5: Solve for x
   x = 51,069,316.80/9,985.01
6. Step 6: Final answer
   x = 5,114.60