Finding the Fourth Proportional to 3,404.30, 5,106.76 and 1,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.30 : 5,106.76 = 1,212.50 : x
2. Step 2: Convert to fraction form
   3,404.30/5,106.76 = 1,212.50/x
3. Step 3: Cross multiply
   3,404.30x = 5,106.76 × 1,212.50
4. Step 4: Simplify right side
   3,404.30x = 6,191,956.24
5. Step 5: Solve for x
   x = 6,191,956.24/3,404.30
6. Step 6: Final answer
   x = 1,818.87