Finding the Fourth Proportional to 1,621.50, 2,237.60 and 913.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.50 : 2,237.60 = 913.46 : x
2. Step 2: Convert to fraction form
   1,621.50/2,237.60 = 913.46/x
3. Step 3: Cross multiply
   1,621.50x = 2,237.60 × 913.46
4. Step 4: Simplify right side
   1,621.50x = 2,043,942.34
5. Step 5: Solve for x
   x = 2,043,942.34/1,621.50
6. Step 6: Final answer
   x = 1,260.53