Finding the Fourth Proportional to 1,158,614.82, 1,598,982.69 and 642,419.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158,614.82 : 1,598,982.69 = 642,419.95 : x
2. Step 2: Convert to fraction form
   1,158,614.82/1,598,982.69 = 642,419.95/x
3. Step 3: Cross multiply
   1,158,614.82x = 1,598,982.69 × 642,419.95
4. Step 4: Simplify right side
   1,158,614.82x = 1,027,218,379,760.67
5. Step 5: Solve for x
   x = 1,027,218,379,760.67/1,158,614.82
6. Step 6: Final answer
   x = 886,591.78