Finding the Fourth Proportional to 2,071,916.28, 2,859,685.56 and 1,392,459.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071,916.28 : 2,859,685.56 = 1,392,459.12 : x
2. Step 2: Convert to fraction form
   2,071,916.28/2,859,685.56 = 1,392,459.12/x
3. Step 3: Cross multiply
   2,071,916.28x = 2,859,685.56 × 1,392,459.12
4. Step 4: Simplify right side
   2,071,916.28x = 3,981,995,238,354.31
5. Step 5: Solve for x
   x = 3,981,995,238,354.31/2,071,916.28
6. Step 6: Final answer
   x = 1,921,890.03