Finding the Fourth Proportional to 1,991.55, 2,981.82 and 1,012.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.55 : 2,981.82 = 1,012.89 : x
2. Step 2: Convert to fraction form
   1,991.55/2,981.82 = 1,012.89/x
3. Step 3: Cross multiply
   1,991.55x = 2,981.82 × 1,012.89
4. Step 4: Simplify right side
   1,991.55x = 3,020,255.66
5. Step 5: Solve for x
   x = 3,020,255.66/1,991.55
6. Step 6: Final answer
   x = 1,516.54