Finding the Fourth Proportional to 942.22, 1,300.42 and 647.25

Step by Step Solution

1. Step 1: Write the proportion equation
   942.22 : 1,300.42 = 647.25 : x
2. Step 2: Convert to fraction form
   942.22/1,300.42 = 647.25/x
3. Step 3: Cross multiply
   942.22x = 1,300.42 × 647.25
4. Step 4: Simplify right side
   942.22x = 841,690.34
5. Step 5: Solve for x
   x = 841,690.34/942.22
6. Step 6: Final answer
   x = 893.31