Finding the Fourth Proportional to 1,100.71, 1,518.74 and 634.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.71 : 1,518.74 = 634.69 : x
2. Step 2: Convert to fraction form
   1,100.71/1,518.74 = 634.69/x
3. Step 3: Cross multiply
   1,100.71x = 1,518.74 × 634.69
4. Step 4: Simplify right side
   1,100.71x = 963,924.50
5. Step 5: Solve for x
   x = 963,924.50/1,100.71
6. Step 6: Final answer
   x = 875.73