Finding the Fourth Proportional to 1,161,061.43, 1,602,318.05 and 644,817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,161,061.43 : 1,602,318.05 = 644,817.72 : x
2. Step 2: Convert to fraction form
   1,161,061.43/1,602,318.05 = 644,817.72/x
3. Step 3: Cross multiply
   1,161,061.43x = 1,602,318.05 × 644,817.72
4. Step 4: Simplify right side
   1,161,061.43x = 1,033,203,071,715.85
5. Step 5: Solve for x
   x = 1,033,203,071,715.85/1,161,061.43
6. Step 6: Final answer
   x = 889,878.04