Finding the Fourth Proportional to 1,479.51, 2,041.76 and 816.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.51 : 2,041.76 = 816.40 : x
2. Step 2: Convert to fraction form
   1,479.51/2,041.76 = 816.40/x
3. Step 3: Cross multiply
   1,479.51x = 2,041.76 × 816.40
4. Step 4: Simplify right side
   1,479.51x = 1,666,892.86
5. Step 5: Solve for x
   x = 1,666,892.86/1,479.51
6. Step 6: Final answer
   x = 1,126.65