Finding the Fourth Proportional to 1,160.00, 1,600.81 and 636.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.00 : 1,600.81 = 636.05 : x
2. Step 2: Convert to fraction form
   1,160.00/1,600.81 = 636.05/x
3. Step 3: Cross multiply
   1,160.00x = 1,600.81 × 636.05
4. Step 4: Simplify right side
   1,160.00x = 1,018,185.61
5. Step 5: Solve for x
   x = 1,018,185.61/1,160.00
6. Step 6: Final answer
   x = 877.74