Finding the Fourth Proportional to 1,388.10, 2,079.87 and 1,094.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.10 : 2,079.87 = 1,094.37 : x
2. Step 2: Convert to fraction form
   1,388.10/2,079.87 = 1,094.37/x
3. Step 3: Cross multiply
   1,388.10x = 2,079.87 × 1,094.37
4. Step 4: Simplify right side
   1,388.10x = 2,276,147.33
5. Step 5: Solve for x
   x = 2,276,147.33/1,388.10
6. Step 6: Final answer
   x = 1,639.76