Finding the Fourth Proportional to 1,388.35, 2,084.93 and 1,345.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.35 : 2,084.93 = 1,345.15 : x
2. Step 2: Convert to fraction form
   1,388.35/2,084.93 = 1,345.15/x
3. Step 3: Cross multiply
   1,388.35x = 2,084.93 × 1,345.15
4. Step 4: Simplify right side
   1,388.35x = 2,804,536.86
5. Step 5: Solve for x
   x = 2,804,536.86/1,388.35
6. Step 6: Final answer
   x = 2,020.05