Finding the Fourth Proportional to 2,101.60, 3,137.05 and 1,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.60 : 3,137.05 = 1,807.30 : x
2. Step 2: Convert to fraction form
   2,101.60/3,137.05 = 1,807.30/x
3. Step 3: Cross multiply
   2,101.60x = 3,137.05 × 1,807.30
4. Step 4: Simplify right side
   2,101.60x = 5,669,590.47
5. Step 5: Solve for x
   x = 5,669,590.47/2,101.60
6. Step 6: Final answer
   x = 2,697.75