Finding the Fourth Proportional to 1,136.00, 1,567.71 and 638.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.00 : 1,567.71 = 638.63 : x
2. Step 2: Convert to fraction form
   1,136.00/1,567.71 = 638.63/x
3. Step 3: Cross multiply
   1,136.00x = 1,567.71 × 638.63
4. Step 4: Simplify right side
   1,136.00x = 1,001,178.80
5. Step 5: Solve for x
   x = 1,001,178.80/1,136.00
6. Step 6: Final answer
   x = 881.32