Finding the Fourth Proportional to 1,083.78, 1,487.16 and 1,064.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.78 : 1,487.16 = 1,064.34 : x
2. Step 2: Convert to fraction form
   1,083.78/1,487.16 = 1,064.34/x
3. Step 3: Cross multiply
   1,083.78x = 1,487.16 × 1,064.34
4. Step 4: Simplify right side
   1,083.78x = 1,582,843.87
5. Step 5: Solve for x
   x = 1,582,843.87/1,083.78
6. Step 6: Final answer
   x = 1,460.48