Finding the Fourth Proportional to 2,140.32, 2,953.62 and 1,355.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.32 : 2,953.62 = 1,355.02 : x
2. Step 2: Convert to fraction form
   2,140.32/2,953.62 = 1,355.02/x
3. Step 3: Cross multiply
   2,140.32x = 2,953.62 × 1,355.02
4. Step 4: Simplify right side
   2,140.32x = 4,002,214.17
5. Step 5: Solve for x
   x = 4,002,214.17/2,140.32
6. Step 6: Final answer
   x = 1,869.91