Finding the Fourth Proportional to 2,663.47, 3,992.50 and 1,274.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.47 : 3,992.50 = 1,274.77 : x
2. Step 2: Convert to fraction form
   2,663.47/3,992.50 = 1,274.77/x
3. Step 3: Cross multiply
   2,663.47x = 3,992.50 × 1,274.77
4. Step 4: Simplify right side
   2,663.47x = 5,089,492.89
5. Step 5: Solve for x
   x = 5,089,492.89/2,663.47
6. Step 6: Final answer
   x = 1,910.85