Finding the Fourth Proportional to 2,217,664.09, 3,060,358.61 and 1,287,458.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217,664.09 : 3,060,358.61 = 1,287,458.15 : x
2. Step 2: Convert to fraction form
   2,217,664.09/3,060,358.61 = 1,287,458.15/x
3. Step 3: Cross multiply
   2,217,664.09x = 3,060,358.61 × 1,287,458.15
4. Step 4: Simplify right side
   2,217,664.09x = 3,940,083,634,367.17
5. Step 5: Solve for x
   x = 3,940,083,634,367.17/2,217,664.09
6. Step 6: Final answer
   x = 1,776,681.89