Finding the Fourth Proportional to 1,131.64, 1,558.96 and 1,076.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.64 : 1,558.96 = 1,076.05 : x
2. Step 2: Convert to fraction form
   1,131.64/1,558.96 = 1,076.05/x
3. Step 3: Cross multiply
   1,131.64x = 1,558.96 × 1,076.05
4. Step 4: Simplify right side
   1,131.64x = 1,677,518.91
5. Step 5: Solve for x
   x = 1,677,518.91/1,131.64
6. Step 6: Final answer
   x = 1,482.38