Finding the Fourth Proportional to 1,373.86, 2,061.15 and 553.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.86 : 2,061.15 = 553.05 : x
2. Step 2: Convert to fraction form
   1,373.86/2,061.15 = 553.05/x
3. Step 3: Cross multiply
   1,373.86x = 2,061.15 × 553.05
4. Step 4: Simplify right side
   1,373.86x = 1,139,922.73
5. Step 5: Solve for x
   x = 1,139,922.73/1,373.86
6. Step 6: Final answer
   x = 829.72