Finding the Fourth Proportional to 1,173.34, 1,619.22 and 707.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.34 : 1,619.22 = 707.50 : x
2. Step 2: Convert to fraction form
   1,173.34/1,619.22 = 707.50/x
3. Step 3: Cross multiply
   1,173.34x = 1,619.22 × 707.50
4. Step 4: Simplify right side
   1,173.34x = 1,145,598.15
5. Step 5: Solve for x
   x = 1,145,598.15/1,173.34
6. Step 6: Final answer
   x = 976.36