Finding the Fourth Proportional to 1,870.10, 2,803.14 and 992.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.10 : 2,803.14 = 992.05 : x
2. Step 2: Convert to fraction form
   1,870.10/2,803.14 = 992.05/x
3. Step 3: Cross multiply
   1,870.10x = 2,803.14 × 992.05
4. Step 4: Simplify right side
   1,870.10x = 2,780,851.75
5. Step 5: Solve for x
   x = 2,780,851.75/1,870.10
6. Step 6: Final answer
   x = 1,487.01