Finding the Fourth Proportional to 1,638.30, 2,260.59 and 929.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.30 : 2,260.59 = 929.82 : x
2. Step 2: Convert to fraction form
   1,638.30/2,260.59 = 929.82/x
3. Step 3: Cross multiply
   1,638.30x = 2,260.59 × 929.82
4. Step 4: Simplify right side
   1,638.30x = 2,101,941.79
5. Step 5: Solve for x
   x = 2,101,941.79/1,638.30
6. Step 6: Final answer
   x = 1,283.00