Finding the Fourth Proportional to 1,368.44, 1,887.77 and 864.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.44 : 1,887.77 = 864.07 : x
2. Step 2: Convert to fraction form
   1,368.44/1,887.77 = 864.07/x
3. Step 3: Cross multiply
   1,368.44x = 1,887.77 × 864.07
4. Step 4: Simplify right side
   1,368.44x = 1,631,165.42
5. Step 5: Solve for x
   x = 1,631,165.42/1,368.44
6. Step 6: Final answer
   x = 1,191.99