Finding the Fourth Proportional to 1,111.64, 1,662.57 and 907.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.64 : 1,662.57 = 907.52 : x
2. Step 2: Convert to fraction form
   1,111.64/1,662.57 = 907.52/x
3. Step 3: Cross multiply
   1,111.64x = 1,662.57 × 907.52
4. Step 4: Simplify right side
   1,111.64x = 1,508,807.21
5. Step 5: Solve for x
   x = 1,508,807.21/1,111.64
6. Step 6: Final answer
   x = 1,357.29