Finding the Fourth Proportional to 1,981.86, 2,970.01 and 1,687.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.86 : 2,970.01 = 1,687.83 : x
2. Step 2: Convert to fraction form
   1,981.86/2,970.01 = 1,687.83/x
3. Step 3: Cross multiply
   1,981.86x = 2,970.01 × 1,687.83
4. Step 4: Simplify right side
   1,981.86x = 5,012,871.98
5. Step 5: Solve for x
   x = 5,012,871.98/1,981.86
6. Step 6: Final answer
   x = 2,529.38