Finding the Fourth Proportional to 1,410.88, 1,946.56 and 913.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.88 : 1,946.56 = 913.90 : x
2. Step 2: Convert to fraction form
   1,410.88/1,946.56 = 913.90/x
3. Step 3: Cross multiply
   1,410.88x = 1,946.56 × 913.90
4. Step 4: Simplify right side
   1,410.88x = 1,778,946.88
5. Step 5: Solve for x
   x = 1,778,946.88/1,410.88
6. Step 6: Final answer
   x = 1,260.88