Finding the Fourth Proportional to 2,920.48, 4,381.30 and 1,071.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.48 : 4,381.30 = 1,071.62 : x
2. Step 2: Convert to fraction form
   2,920.48/4,381.30 = 1,071.62/x
3. Step 3: Cross multiply
   2,920.48x = 4,381.30 × 1,071.62
4. Step 4: Simplify right side
   2,920.48x = 4,695,066.80
5. Step 5: Solve for x
   x = 4,695,066.80/2,920.48
6. Step 6: Final answer
   x = 1,607.63