Finding the Fourth Proportional to 2,760,026.88, 4,139,768.16 and 866,717.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760,026.88 : 4,139,768.16 = 866,717.76 : x
2. Step 2: Convert to fraction form
   2,760,026.88/4,139,768.16 = 866,717.76/x
3. Step 3: Cross multiply
   2,760,026.88x = 4,139,768.16 × 866,717.76
4. Step 4: Simplify right side
   2,760,026.88x = 3,588,010,586,554.52
5. Step 5: Solve for x
   x = 3,588,010,586,554.52/2,760,026.88
6. Step 6: Final answer
   x = 1,299,991.17