Finding the Fourth Proportional to 1,981.83, 2,973.20 and 1,056.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.83 : 2,973.20 = 1,056.90 : x
2. Step 2: Convert to fraction form
   1,981.83/2,973.20 = 1,056.90/x
3. Step 3: Cross multiply
   1,981.83x = 2,973.20 × 1,056.90
4. Step 4: Simplify right side
   1,981.83x = 3,142,369.80
5. Step 5: Solve for x
   x = 3,142,369.80/1,981.83
6. Step 6: Final answer
   x = 1,585.59