Finding the Fourth Proportional to 1,188.34, 1,641.40 and 1,150.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.34 : 1,641.40 = 1,150.07 : x
2. Step 2: Convert to fraction form
   1,188.34/1,641.40 = 1,150.07/x
3. Step 3: Cross multiply
   1,188.34x = 1,641.40 × 1,150.07
4. Step 4: Simplify right side
   1,188.34x = 1,887,713.82
5. Step 5: Solve for x
   x = 1,887,713.82/1,188.34
6. Step 6: Final answer
   x = 1,588.53