Finding the Fourth Proportional to 1,917.52, 2,646.06 and 1,131.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.52 : 2,646.06 = 1,131.64 : x
2. Step 2: Convert to fraction form
   1,917.52/2,646.06 = 1,131.64/x
3. Step 3: Cross multiply
   1,917.52x = 2,646.06 × 1,131.64
4. Step 4: Simplify right side
   1,917.52x = 2,994,387.34
5. Step 5: Solve for x
   x = 2,994,387.34/1,917.52
6. Step 6: Final answer
   x = 1,561.59