Finding the Fourth Proportional to 1,985.81, 2,977.83 and 1,061.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.81 : 2,977.83 = 1,061.15 : x
2. Step 2: Convert to fraction form
   1,985.81/2,977.83 = 1,061.15/x
3. Step 3: Cross multiply
   1,985.81x = 2,977.83 × 1,061.15
4. Step 4: Simplify right side
   1,985.81x = 3,159,931.75
5. Step 5: Solve for x
   x = 3,159,931.75/1,985.81
6. Step 6: Final answer
   x = 1,591.25