Finding the Fourth Proportional to 2,129.05, 3,174.77 and 1,870.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.05 : 3,174.77 = 1,870.11 : x
2. Step 2: Convert to fraction form
   2,129.05/3,174.77 = 1,870.11/x
3. Step 3: Cross multiply
   2,129.05x = 3,174.77 × 1,870.11
4. Step 4: Simplify right side
   2,129.05x = 5,937,173.80
5. Step 5: Solve for x
   x = 5,937,173.80/2,129.05
6. Step 6: Final answer
   x = 2,788.65