Finding the Fourth Proportional to 3,139.63, 4,332.89 and 1,742.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.63 : 4,332.89 = 1,742.38 : x
2. Step 2: Convert to fraction form
   3,139.63/4,332.89 = 1,742.38/x
3. Step 3: Cross multiply
   3,139.63x = 4,332.89 × 1,742.38
4. Step 4: Simplify right side
   3,139.63x = 7,549,510.50
5. Step 5: Solve for x
   x = 7,549,510.50/3,139.63
6. Step 6: Final answer
   x = 2,404.59