Finding the Fourth Proportional to 1,807.47, 2,494.29 and 1,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.47 : 2,494.29 = 1,021.50 : x
2. Step 2: Convert to fraction form
   1,807.47/2,494.29 = 1,021.50/x
3. Step 3: Cross multiply
   1,807.47x = 2,494.29 × 1,021.50
4. Step 4: Simplify right side
   1,807.47x = 2,547,917.24
5. Step 5: Solve for x
   x = 2,547,917.24/1,807.47
6. Step 6: Final answer
   x = 1,409.66