Finding the Fourth Proportional to 3,131.40, 4,697.64 and 1,051.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.40 : 4,697.64 = 1,051.61 : x
2. Step 2: Convert to fraction form
   3,131.40/4,697.64 = 1,051.61/x
3. Step 3: Cross multiply
   3,131.40x = 4,697.64 × 1,051.61
4. Step 4: Simplify right side
   3,131.40x = 4,940,061.71
5. Step 5: Solve for x
   x = 4,940,061.71/3,131.40
6. Step 6: Final answer
   x = 1,577.59