Finding the Fourth Proportional to 1,410.79, 2,116.46 and 436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.79 : 2,116.46 = 436.72 : x
2. Step 2: Convert to fraction form
   1,410.79/2,116.46 = 436.72/x
3. Step 3: Cross multiply
   1,410.79x = 2,116.46 × 436.72
4. Step 4: Simplify right side
   1,410.79x = 924,300.41
5. Step 5: Solve for x
   x = 924,300.41/1,410.79
6. Step 6: Final answer
   x = 655.17