Finding the Fourth Proportional to 1,359.40, 1,875.90 and 770.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.40 : 1,875.90 = 770.02 : x
2. Step 2: Convert to fraction form
   1,359.40/1,875.90 = 770.02/x
3. Step 3: Cross multiply
   1,359.40x = 1,875.90 × 770.02
4. Step 4: Simplify right side
   1,359.40x = 1,444,480.52
5. Step 5: Solve for x
   x = 1,444,480.52/1,359.40
6. Step 6: Final answer
   x = 1,062.59