Finding the Fourth Proportional to 1,536.56, 2,120.39 and 907.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.56 : 2,120.39 = 907.10 : x
2. Step 2: Convert to fraction form
   1,536.56/2,120.39 = 907.10/x
3. Step 3: Cross multiply
   1,536.56x = 2,120.39 × 907.10
4. Step 4: Simplify right side
   1,536.56x = 1,923,409.94
5. Step 5: Solve for x
   x = 1,923,409.94/1,536.56
6. Step 6: Final answer
   x = 1,251.76