Finding the Fourth Proportional to 1,981.42, 2,969.29 and 1,113.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.42 : 2,969.29 = 1,113.91 : x
2. Step 2: Convert to fraction form
   1,981.42/2,969.29 = 1,113.91/x
3. Step 3: Cross multiply
   1,981.42x = 2,969.29 × 1,113.91
4. Step 4: Simplify right side
   1,981.42x = 3,307,501.41
5. Step 5: Solve for x
   x = 3,307,501.41/1,981.42
6. Step 6: Final answer
   x = 1,669.26