Finding the Fourth Proportional to 1,355.03, 1,870.14 and 824.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.03 : 1,870.14 = 824.07 : x
2. Step 2: Convert to fraction form
   1,355.03/1,870.14 = 824.07/x
3. Step 3: Cross multiply
   1,355.03x = 1,870.14 × 824.07
4. Step 4: Simplify right side
   1,355.03x = 1,541,126.27
5. Step 5: Solve for x
   x = 1,541,126.27/1,355.03
6. Step 6: Final answer
   x = 1,137.34