Finding the Fourth Proportional to 1,065,608.55, 1,590,639.24 and 931,086.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065,608.55 : 1,590,639.24 = 931,086.18 : x
2. Step 2: Convert to fraction form
   1,065,608.55/1,590,639.24 = 931,086.18/x
3. Step 3: Cross multiply
   1,065,608.55x = 1,590,639.24 × 931,086.18
4. Step 4: Simplify right side
   1,065,608.55x = 1,481,022,213,729.70
5. Step 5: Solve for x
   x = 1,481,022,213,729.70/1,065,608.55
6. Step 6: Final answer
   x = 1,389,837.02