Finding the Fourth Proportional to 1,529.25, 2,109.78 and 1,131.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.25 : 2,109.78 = 1,131.87 : x
2. Step 2: Convert to fraction form
   1,529.25/2,109.78 = 1,131.87/x
3. Step 3: Cross multiply
   1,529.25x = 2,109.78 × 1,131.87
4. Step 4: Simplify right side
   1,529.25x = 2,387,996.69
5. Step 5: Solve for x
   x = 2,387,996.69/1,529.25
6. Step 6: Final answer
   x = 1,561.55