Finding the Fourth Proportional to 1,410.69, 2,116.31 and 436.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.69 : 2,116.31 = 436.75 : x
2. Step 2: Convert to fraction form
   1,410.69/2,116.31 = 436.75/x
3. Step 3: Cross multiply
   1,410.69x = 2,116.31 × 436.75
4. Step 4: Simplify right side
   1,410.69x = 924,298.39
5. Step 5: Solve for x
   x = 924,298.39/1,410.69
6. Step 6: Final answer
   x = 655.21