Finding the Fourth Proportional to 2,485,871.05, 3,728,964.18 and 780,081.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485,871.05 : 3,728,964.18 = 780,081.67 : x
2. Step 2: Convert to fraction form
   2,485,871.05/3,728,964.18 = 780,081.67/x
3. Step 3: Cross multiply
   2,485,871.05x = 3,728,964.18 × 780,081.67
4. Step 4: Simplify right side
   2,485,871.05x = 2,908,896,606,457.63
5. Step 5: Solve for x
   x = 2,908,896,606,457.63/2,485,871.05
6. Step 6: Final answer
   x = 1,170,171.96