Finding the Fourth Proportional to 1,531.42, 2,112.42 and 1,335.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.42 : 2,112.42 = 1,335.40 : x
2. Step 2: Convert to fraction form
   1,531.42/2,112.42 = 1,335.40/x
3. Step 3: Cross multiply
   1,531.42x = 2,112.42 × 1,335.40
4. Step 4: Simplify right side
   1,531.42x = 2,820,925.67
5. Step 5: Solve for x
   x = 2,820,925.67/1,531.42
6. Step 6: Final answer
   x = 1,842.03