Finding the Fourth Proportional to 1,642,643.59, 2,266,824.01 and 917,501.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642,643.59 : 2,266,824.01 = 917,501.89 : x
2. Step 2: Convert to fraction form
   1,642,643.59/2,266,824.01 = 917,501.89/x
3. Step 3: Cross multiply
   1,642,643.59x = 2,266,824.01 × 917,501.89
4. Step 4: Simplify right side
   1,642,643.59x = 2,079,815,313,472.38
5. Step 5: Solve for x
   x = 2,079,815,313,472.38/1,642,643.59
6. Step 6: Final answer
   x = 1,266,139.12