Finding the Fourth Proportional to 1,917.51, 2,646.18 and 1,131.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.51 : 2,646.18 = 1,131.55 : x
2. Step 2: Convert to fraction form
   1,917.51/2,646.18 = 1,131.55/x
3. Step 3: Cross multiply
   1,917.51x = 2,646.18 × 1,131.55
4. Step 4: Simplify right side
   1,917.51x = 2,994,284.98
5. Step 5: Solve for x
   x = 2,994,284.98/1,917.51
6. Step 6: Final answer
   x = 1,561.55