Finding the Fourth Proportional to 1,215.94, 1,824.93 and 631.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.94 : 1,824.93 = 631.30 : x
2. Step 2: Convert to fraction form
   1,215.94/1,824.93 = 631.30/x
3. Step 3: Cross multiply
   1,215.94x = 1,824.93 × 631.30
4. Step 4: Simplify right side
   1,215.94x = 1,152,082.17
5. Step 5: Solve for x
   x = 1,152,082.17/1,215.94
6. Step 6: Final answer
   x = 947.48