Finding the Fourth Proportional to 1,368.81, 1,888.31 and 995.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.81 : 1,888.31 = 995.63 : x
2. Step 2: Convert to fraction form
   1,368.81/1,888.31 = 995.63/x
3. Step 3: Cross multiply
   1,368.81x = 1,888.31 × 995.63
4. Step 4: Simplify right side
   1,368.81x = 1,880,051.13
5. Step 5: Solve for x
   x = 1,880,051.13/1,368.81
6. Step 6: Final answer
   x = 1,373.49