Finding the Fourth Proportional to 1,156.05, 1,593.81 and 998.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.05 : 1,593.81 = 998.10 : x
2. Step 2: Convert to fraction form
   1,156.05/1,593.81 = 998.10/x
3. Step 3: Cross multiply
   1,156.05x = 1,593.81 × 998.10
4. Step 4: Simplify right side
   1,156.05x = 1,590,781.76
5. Step 5: Solve for x
   x = 1,590,781.76/1,156.05
6. Step 6: Final answer
   x = 1,376.05