Finding the Fourth Proportional to 1,479.86, 2,041.88 and 858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.86 : 2,041.88 = 858.50 : x
2. Step 2: Convert to fraction form
   1,479.86/2,041.88 = 858.50/x
3. Step 3: Cross multiply
   1,479.86x = 2,041.88 × 858.50
4. Step 4: Simplify right side
   1,479.86x = 1,752,953.98
5. Step 5: Solve for x
   x = 1,752,953.98/1,479.86
6. Step 6: Final answer
   x = 1,184.54