Finding the Fourth Proportional to 1,406.02, 1,940.28 and 776.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.02 : 1,940.28 = 776.55 : x
2. Step 2: Convert to fraction form
   1,406.02/1,940.28 = 776.55/x
3. Step 3: Cross multiply
   1,406.02x = 1,940.28 × 776.55
4. Step 4: Simplify right side
   1,406.02x = 1,506,724.43
5. Step 5: Solve for x
   x = 1,506,724.43/1,406.02
6. Step 6: Final answer
   x = 1,071.62