Finding the Fourth Proportional to 1,345.21, 1,857.29 and 841.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.21 : 1,857.29 = 841.27 : x
2. Step 2: Convert to fraction form
   1,345.21/1,857.29 = 841.27/x
3. Step 3: Cross multiply
   1,345.21x = 1,857.29 × 841.27
4. Step 4: Simplify right side
   1,345.21x = 1,562,482.36
5. Step 5: Solve for x
   x = 1,562,482.36/1,345.21
6. Step 6: Final answer
   x = 1,161.52