Finding the Fourth Proportional to 2,602.86, 3,591.89 and 1,423.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602.86 : 3,591.89 = 1,423.90 : x
2. Step 2: Convert to fraction form
   2,602.86/3,591.89 = 1,423.90/x
3. Step 3: Cross multiply
   2,602.86x = 3,591.89 × 1,423.90
4. Step 4: Simplify right side
   2,602.86x = 5,114,492.17
5. Step 5: Solve for x
   x = 5,114,492.17/2,602.86
6. Step 6: Final answer
   x = 1,964.95