Finding the Fourth Proportional to 1,666.82, 2,499.93 and 434.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.82 : 2,499.93 = 434.15 : x
2. Step 2: Convert to fraction form
   1,666.82/2,499.93 = 434.15/x
3. Step 3: Cross multiply
   1,666.82x = 2,499.93 × 434.15
4. Step 4: Simplify right side
   1,666.82x = 1,085,353.33
5. Step 5: Solve for x
   x = 1,085,353.33/1,666.82
6. Step 6: Final answer
   x = 651.15