Finding the Fourth Proportional to 1,598.76, 2,199.89 and 1,225.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.76 : 2,199.89 = 1,225.60 : x
2. Step 2: Convert to fraction form
   1,598.76/2,199.89 = 1,225.60/x
3. Step 3: Cross multiply
   1,598.76x = 2,199.89 × 1,225.60
4. Step 4: Simplify right side
   1,598.76x = 2,696,182.75
5. Step 5: Solve for x
   x = 2,696,182.75/1,598.76
6. Step 6: Final answer
   x = 1,686.42