Finding the Fourth Proportional to 1,145.60, 1,714.29 and 992.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.60 : 1,714.29 = 992.05 : x
2. Step 2: Convert to fraction form
   1,145.60/1,714.29 = 992.05/x
3. Step 3: Cross multiply
   1,145.60x = 1,714.29 × 992.05
4. Step 4: Simplify right side
   1,145.60x = 1,700,661.39
5. Step 5: Solve for x
   x = 1,700,661.39/1,145.60
6. Step 6: Final answer
   x = 1,484.52