Finding the Fourth Proportional to 1,942.55, 2,915.01 and 772.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.55 : 2,915.01 = 772.34 : x
2. Step 2: Convert to fraction form
   1,942.55/2,915.01 = 772.34/x
3. Step 3: Cross multiply
   1,942.55x = 2,915.01 × 772.34
4. Step 4: Simplify right side
   1,942.55x = 2,251,378.82
5. Step 5: Solve for x
   x = 2,251,378.82/1,942.55
6. Step 6: Final answer
   x = 1,158.98