Finding the Fourth Proportional to 1,111.13, 1,661.82 and 907.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.13 : 1,661.82 = 907.01 : x
2. Step 2: Convert to fraction form
   1,111.13/1,661.82 = 907.01/x
3. Step 3: Cross multiply
   1,111.13x = 1,661.82 × 907.01
4. Step 4: Simplify right side
   1,111.13x = 1,507,287.36
5. Step 5: Solve for x
   x = 1,507,287.36/1,111.13
6. Step 6: Final answer
   x = 1,356.54