Finding the Fourth Proportional to 3,131.19, 4,697.49 and 1,051.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.19 : 4,697.49 = 1,051.31 : x
2. Step 2: Convert to fraction form
   3,131.19/4,697.49 = 1,051.31/x
3. Step 3: Cross multiply
   3,131.19x = 4,697.49 × 1,051.31
4. Step 4: Simplify right side
   3,131.19x = 4,938,518.21
5. Step 5: Solve for x
   x = 4,938,518.21/3,131.19
6. Step 6: Final answer
   x = 1,577.20