Finding the Fourth Proportional to 1,111.19, 1,667.61 and 897.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.19 : 1,667.61 = 897.35 : x
2. Step 2: Convert to fraction form
   1,111.19/1,667.61 = 897.35/x
3. Step 3: Cross multiply
   1,111.19x = 1,667.61 × 897.35
4. Step 4: Simplify right side
   1,111.19x = 1,496,421.50
5. Step 5: Solve for x
   x = 1,496,421.50/1,111.19
6. Step 6: Final answer
   x = 1,346.69