Finding the Fourth Proportional to 1,892.13, 2,830.91 and 1,272.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.13 : 2,830.91 = 1,272.89 : x
2. Step 2: Convert to fraction form
   1,892.13/2,830.91 = 1,272.89/x
3. Step 3: Cross multiply
   1,892.13x = 2,830.91 × 1,272.89
4. Step 4: Simplify right side
   1,892.13x = 3,603,416.51
5. Step 5: Solve for x
   x = 3,603,416.51/1,892.13
6. Step 6: Final answer
   x = 1,904.42