Finding the Fourth Proportional to 2,516.76, 3,770.70 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.76 : 3,770.70 = 1,215.42 : x
2. Step 2: Convert to fraction form
   2,516.76/3,770.70 = 1,215.42/x
3. Step 3: Cross multiply
   2,516.76x = 3,770.70 × 1,215.42
4. Step 4: Simplify right side
   2,516.76x = 4,582,984.19
5. Step 5: Solve for x
   x = 4,582,984.19/2,516.76
6. Step 6: Final answer
   x = 1,820.99