Finding the Fourth Proportional to 2,129.32, 2,937.81 and 1,290.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.32 : 2,937.81 = 1,290.52 : x
2. Step 2: Convert to fraction form
   2,129.32/2,937.81 = 1,290.52/x
3. Step 3: Cross multiply
   2,129.32x = 2,937.81 × 1,290.52
4. Step 4: Simplify right side
   2,129.32x = 3,791,302.56
5. Step 5: Solve for x
   x = 3,791,302.56/2,129.32
6. Step 6: Final answer
   x = 1,780.52