Finding the Fourth Proportional to 2,142.06, 3,212.01 and 988.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.06 : 3,212.01 = 988.62 : x
2. Step 2: Convert to fraction form
   2,142.06/3,212.01 = 988.62/x
3. Step 3: Cross multiply
   2,142.06x = 3,212.01 × 988.62
4. Step 4: Simplify right side
   2,142.06x = 3,175,457.33
5. Step 5: Solve for x
   x = 3,175,457.33/2,142.06
6. Step 6: Final answer
   x = 1,482.43