Finding the Fourth Proportional to 2,385.18, 3,572.00 and 1,212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.18 : 3,572.00 = 1,212.10 : x
2. Step 2: Convert to fraction form
   2,385.18/3,572.00 = 1,212.10/x
3. Step 3: Cross multiply
   2,385.18x = 3,572.00 × 1,212.10
4. Step 4: Simplify right side
   2,385.18x = 4,329,606.21
5. Step 5: Solve for x
   x = 4,329,606.21/2,385.18
6. Step 6: Final answer
   x = 1,815.21