Finding the Fourth Proportional to 1,462.04, 2,191.82 and 639.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,462.04 : 2,191.82 = 639.69 : x
2. Step 2: Convert to fraction form
   1,462.04/2,191.82 = 639.69/x
3. Step 3: Cross multiply
   1,462.04x = 2,191.82 × 639.69
4. Step 4: Simplify right side
   1,462.04x = 1,402,085.34
5. Step 5: Solve for x
   x = 1,402,085.34/1,462.04
6. Step 6: Final answer
   x = 958.99