Finding the Fourth Proportional to 2,980.72, 4,110.70 and 1,861.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.72 : 4,110.70 = 1,861.76 : x
2. Step 2: Convert to fraction form
   2,980.72/4,110.70 = 1,861.76/x
3. Step 3: Cross multiply
   2,980.72x = 4,110.70 × 1,861.76
4. Step 4: Simplify right side
   2,980.72x = 7,653,136.83
5. Step 5: Solve for x
   x = 7,653,136.83/2,980.72
6. Step 6: Final answer
   x = 2,567.55