Finding the Fourth Proportional to 3,607.30, 4,979.40 and 2,116.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,607.30 : 4,979.40 = 2,116.47 : x
2. Step 2: Convert to fraction form
   3,607.30/4,979.40 = 2,116.47/x
3. Step 3: Cross multiply
   3,607.30x = 4,979.40 × 2,116.47
4. Step 4: Simplify right side
   3,607.30x = 10,538,779.31
5. Step 5: Solve for x
   x = 10,538,779.31/3,607.30
6. Step 6: Final answer
   x = 2,921.51