Finding the Fourth Proportional to 1,345.22, 1,857.23 and 1,066.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.22 : 1,857.23 = 1,066.58 : x
2. Step 2: Convert to fraction form
   1,345.22/1,857.23 = 1,066.58/x
3. Step 3: Cross multiply
   1,345.22x = 1,857.23 × 1,066.58
4. Step 4: Simplify right side
   1,345.22x = 1,980,869.75
5. Step 5: Solve for x
   x = 1,980,869.75/1,345.22
6. Step 6: Final answer
   x = 1,472.53