Finding the Fourth Proportional to 1,158,559.34, 1,598,862.42 and 642,280.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158,559.34 : 1,598,862.42 = 642,280.37 : x
2. Step 2: Convert to fraction form
   1,158,559.34/1,598,862.42 = 642,280.37/x
3. Step 3: Cross multiply
   1,158,559.34x = 1,598,862.42 × 642,280.37
4. Step 4: Simplify right side
   1,158,559.34x = 1,026,917,938,702.38
5. Step 5: Solve for x
   x = 1,026,917,938,702.38/1,158,559.34
6. Step 6: Final answer
   x = 886,374.92