Finding the Fourth Proportional to 2,715.72, 4,070.45 and 1,251.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.72 : 4,070.45 = 1,251.81 : x
2. Step 2: Convert to fraction form
   2,715.72/4,070.45 = 1,251.81/x
3. Step 3: Cross multiply
   2,715.72x = 4,070.45 × 1,251.81
4. Step 4: Simplify right side
   2,715.72x = 5,095,423.76
5. Step 5: Solve for x
   x = 5,095,423.76/2,715.72
6. Step 6: Final answer
   x = 1,876.27