Finding the Fourth Proportional to 1,007.46, 1,389.33 and 634.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.46 : 1,389.33 = 634.50 : x
2. Step 2: Convert to fraction form
   1,007.46/1,389.33 = 634.50/x
3. Step 3: Cross multiply
   1,007.46x = 1,389.33 × 634.50
4. Step 4: Simplify right side
   1,007.46x = 881,529.89
5. Step 5: Solve for x
   x = 881,529.89/1,007.46
6. Step 6: Final answer
   x = 875.00