Finding the Fourth Proportional to 1,151,588.82, 1,589,192.72 and 642,291.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151,588.82 : 1,589,192.72 = 642,291.18 : x
2. Step 2: Convert to fraction form
   1,151,588.82/1,589,192.72 = 642,291.18/x
3. Step 3: Cross multiply
   1,151,588.82x = 1,589,192.72 × 642,291.18
4. Step 4: Simplify right side
   1,151,588.82x = 1,020,724,467,376.21
5. Step 5: Solve for x
   x = 1,020,724,467,376.21/1,151,588.82
6. Step 6: Final answer
   x = 886,361.91