Finding the Fourth Proportional to 1,688.15, 2,329.35 and 942.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.15 : 2,329.35 = 942.05 : x
2. Step 2: Convert to fraction form
   1,688.15/2,329.35 = 942.05/x
3. Step 3: Cross multiply
   1,688.15x = 2,329.35 × 942.05
4. Step 4: Simplify right side
   1,688.15x = 2,194,364.17
5. Step 5: Solve for x
   x = 2,194,364.17/1,688.15
6. Step 6: Final answer
   x = 1,299.86