Finding the Fourth Proportional to 1,405.00, 1,938.86 and 775.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.00 : 1,938.86 = 775.59 : x
2. Step 2: Convert to fraction form
   1,405.00/1,938.86 = 775.59/x
3. Step 3: Cross multiply
   1,405.00x = 1,938.86 × 775.59
4. Step 4: Simplify right side
   1,405.00x = 1,503,752.67
5. Step 5: Solve for x
   x = 1,503,752.67/1,405.00
6. Step 6: Final answer
   x = 1,070.29