Finding the Fourth Proportional to 1,084.58, 1,496.60 and 612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.58 : 1,496.60 = 612.50 : x
2. Step 2: Convert to fraction form
   1,084.58/1,496.60 = 612.50/x
3. Step 3: Cross multiply
   1,084.58x = 1,496.60 × 612.50
4. Step 4: Simplify right side
   1,084.58x = 916,656.95
5. Step 5: Solve for x
   x = 916,656.95/1,084.58
6. Step 6: Final answer
   x = 845.18