Finding the Fourth Proportional to 2,106.02, 3,157.80 and 1,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.02 : 3,157.80 = 1,238.50 : x
2. Step 2: Convert to fraction form
   2,106.02/3,157.80 = 1,238.50/x
3. Step 3: Cross multiply
   2,106.02x = 3,157.80 × 1,238.50
4. Step 4: Simplify right side
   2,106.02x = 3,910,935.30
5. Step 5: Solve for x
   x = 3,910,935.30/2,106.02
6. Step 6: Final answer
   x = 1,857.03