Finding the Fourth Proportional to 2,156.86, 3,232.20 and 1,230.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.86 : 3,232.20 = 1,230.50 : x
2. Step 2: Convert to fraction form
   2,156.86/3,232.20 = 1,230.50/x
3. Step 3: Cross multiply
   2,156.86x = 3,232.20 × 1,230.50
4. Step 4: Simplify right side
   2,156.86x = 3,977,222.10
5. Step 5: Solve for x
   x = 3,977,222.10/2,156.86
6. Step 6: Final answer
   x = 1,843.99