Finding the Fourth Proportional to 1,092.69, 1,638.90 and 476.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.69 : 1,638.90 = 476.82 : x
2. Step 2: Convert to fraction form
   1,092.69/1,638.90 = 476.82/x
3. Step 3: Cross multiply
   1,092.69x = 1,638.90 × 476.82
4. Step 4: Simplify right side
   1,092.69x = 781,460.30
5. Step 5: Solve for x
   x = 781,460.30/1,092.69
6. Step 6: Final answer
   x = 715.17