Finding the Fourth Proportional to 1,380.07, 1,903.20 and 1,064.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.07 : 1,903.20 = 1,064.83 : x
2. Step 2: Convert to fraction form
   1,380.07/1,903.20 = 1,064.83/x
3. Step 3: Cross multiply
   1,380.07x = 1,903.20 × 1,064.83
4. Step 4: Simplify right side
   1,380.07x = 2,026,579.13
5. Step 5: Solve for x
   x = 2,026,579.13/1,380.07
6. Step 6: Final answer
   x = 1,468.46