Finding the Fourth Proportional to 1,688.47, 2,330.18 and 942.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.47 : 2,330.18 = 942.43 : x
2. Step 2: Convert to fraction form
   1,688.47/2,330.18 = 942.43/x
3. Step 3: Cross multiply
   1,688.47x = 2,330.18 × 942.43
4. Step 4: Simplify right side
   1,688.47x = 2,196,026.83
5. Step 5: Solve for x
   x = 2,196,026.83/1,688.47
6. Step 6: Final answer
   x = 1,300.61