Finding the Fourth Proportional to 1,415.16, 2,123.01 and 490.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.16 : 2,123.01 = 490.86 : x
2. Step 2: Convert to fraction form
   1,415.16/2,123.01 = 490.86/x
3. Step 3: Cross multiply
   1,415.16x = 2,123.01 × 490.86
4. Step 4: Simplify right side
   1,415.16x = 1,042,100.69
5. Step 5: Solve for x
   x = 1,042,100.69/1,415.16
6. Step 6: Final answer
   x = 736.38