Finding the Fourth Proportional to 3,124.56, 4,686.72 and 784.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,124.56 : 4,686.72 = 784.58 : x
2. Step 2: Convert to fraction form
   3,124.56/4,686.72 = 784.58/x
3. Step 3: Cross multiply
   3,124.56x = 4,686.72 × 784.58
4. Step 4: Simplify right side
   3,124.56x = 3,677,127.29
5. Step 5: Solve for x
   x = 3,677,127.29/3,124.56
6. Step 6: Final answer
   x = 1,176.85