Finding the Fourth Proportional to 2,117.89, 3,172.59 and 1,018.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.89 : 3,172.59 = 1,018.99 : x
2. Step 2: Convert to fraction form
   2,117.89/3,172.59 = 1,018.99/x
3. Step 3: Cross multiply
   2,117.89x = 3,172.59 × 1,018.99
4. Step 4: Simplify right side
   2,117.89x = 3,232,841.59
5. Step 5: Solve for x
   x = 3,232,841.59/2,117.89
6. Step 6: Final answer
   x = 1,526.44