Finding the Fourth Proportional to 3,997.58, 5,513.90 and 3,156.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.58 : 5,513.90 = 3,156.93 : x
2. Step 2: Convert to fraction form
   3,997.58/5,513.90 = 3,156.93/x
3. Step 3: Cross multiply
   3,997.58x = 5,513.90 × 3,156.93
4. Step 4: Simplify right side
   3,997.58x = 17,406,980.54
5. Step 5: Solve for x
   x = 17,406,980.54/3,997.58
6. Step 6: Final answer
   x = 4,354.38