Finding the Fourth Proportional to 1,689,424.72, 2,331,387.55 and 915,036.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,424.72 : 2,331,387.55 = 915,036.31 : x
2. Step 2: Convert to fraction form
   1,689,424.72/2,331,387.55 = 915,036.31/x
3. Step 3: Cross multiply
   1,689,424.72x = 2,331,387.55 × 915,036.31
4. Step 4: Simplify right side
   1,689,424.72x = 2,133,304,260,931.94
5. Step 5: Solve for x
   x = 2,133,304,260,931.94/1,689,424.72
6. Step 6: Final answer
   x = 1,262,740.05