Finding the Fourth Proportional to 1,900.61, 2,851.57 and 790.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.61 : 2,851.57 = 790.62 : x
2. Step 2: Convert to fraction form
   1,900.61/2,851.57 = 790.62/x
3. Step 3: Cross multiply
   1,900.61x = 2,851.57 × 790.62
4. Step 4: Simplify right side
   1,900.61x = 2,254,502.14
5. Step 5: Solve for x
   x = 2,254,502.14/1,900.61
6. Step 6: Final answer
   x = 1,186.20