Finding the Fourth Proportional to 1,030.87, 1,422.83 and 657.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.87 : 1,422.83 = 657.77 : x
2. Step 2: Convert to fraction form
   1,030.87/1,422.83 = 657.77/x
3. Step 3: Cross multiply
   1,030.87x = 1,422.83 × 657.77
4. Step 4: Simplify right side
   1,030.87x = 935,894.89
5. Step 5: Solve for x
   x = 935,894.89/1,030.87
6. Step 6: Final answer
   x = 907.87