Finding the Fourth Proportional to 1,128.34, 1,558.17 and 1,066.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.34 : 1,558.17 = 1,066.98 : x
2. Step 2: Convert to fraction form
   1,128.34/1,558.17 = 1,066.98/x
3. Step 3: Cross multiply
   1,128.34x = 1,558.17 × 1,066.98
4. Step 4: Simplify right side
   1,128.34x = 1,662,536.23
5. Step 5: Solve for x
   x = 1,662,536.23/1,128.34
6. Step 6: Final answer
   x = 1,473.44