Finding the Fourth Proportional to 1,111.06, 1,667.16 and 907.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.06 : 1,667.16 = 907.96 : x
2. Step 2: Convert to fraction form
   1,111.06/1,667.16 = 907.96/x
3. Step 3: Cross multiply
   1,111.06x = 1,667.16 × 907.96
4. Step 4: Simplify right side
   1,111.06x = 1,513,714.59
5. Step 5: Solve for x
   x = 1,513,714.59/1,111.06
6. Step 6: Final answer
   x = 1,362.41