Finding the Fourth Proportional to 1,531.68, 2,113.72 and 942.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.68 : 2,113.72 = 942.08 : x
2. Step 2: Convert to fraction form
   1,531.68/2,113.72 = 942.08/x
3. Step 3: Cross multiply
   1,531.68x = 2,113.72 × 942.08
4. Step 4: Simplify right side
   1,531.68x = 1,991,293.34
5. Step 5: Solve for x
   x = 1,991,293.34/1,531.68
6. Step 6: Final answer
   x = 1,300.07