Finding the Fourth Proportional to 1,150,239.89, 1,587,337.36 and 667,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150,239.89 : 1,587,337.36 = 667,091.50 : x
2. Step 2: Convert to fraction form
   1,150,239.89/1,587,337.36 = 667,091.50/x
3. Step 3: Cross multiply
   1,150,239.89x = 1,587,337.36 × 667,091.50
4. Step 4: Simplify right side
   1,150,239.89x = 1,058,899,254,852.37
5. Step 5: Solve for x
   x = 1,058,899,254,852.37/1,150,239.89
6. Step 6: Final answer
   x = 920,589.92