Finding the Fourth Proportional to 1,771.81, 2,445.47 and 1,420.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,771.81 : 2,445.47 = 1,420.07 : x
2. Step 2: Convert to fraction form
   1,771.81/2,445.47 = 1,420.07/x
3. Step 3: Cross multiply
   1,771.81x = 2,445.47 × 1,420.07
4. Step 4: Simplify right side
   1,771.81x = 3,472,738.58
5. Step 5: Solve for x
   x = 3,472,738.58/1,771.81
6. Step 6: Final answer
   x = 1,959.99