Finding the Fourth Proportional to 1,200.34, 1,800.42 and 716.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.34 : 1,800.42 = 716.50 : x
2. Step 2: Convert to fraction form
   1,200.34/1,800.42 = 716.50/x
3. Step 3: Cross multiply
   1,200.34x = 1,800.42 × 716.50
4. Step 4: Simplify right side
   1,200.34x = 1,290,000.93
5. Step 5: Solve for x
   x = 1,290,000.93/1,200.34
6. Step 6: Final answer
   x = 1,074.70