Finding the Fourth Proportional to 1,587,990.69, 2,191,440.52 and 862,838.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587,990.69 : 2,191,440.52 = 862,838.42 : x
2. Step 2: Convert to fraction form
   1,587,990.69/2,191,440.52 = 862,838.42/x
3. Step 3: Cross multiply
   1,587,990.69x = 2,191,440.52 × 862,838.42
4. Step 4: Simplify right side
   1,587,990.69x = 1,890,859,075,800.78
5. Step 5: Solve for x
   x = 1,890,859,075,800.78/1,587,990.69
6. Step 6: Final answer
   x = 1,190,724.28