Finding the Fourth Proportional to 1,531.63, 2,114.78 and 1,354.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.63 : 2,114.78 = 1,354.78 : x
2. Step 2: Convert to fraction form
   1,531.63/2,114.78 = 1,354.78/x
3. Step 3: Cross multiply
   1,531.63x = 2,114.78 × 1,354.78
4. Step 4: Simplify right side
   1,531.63x = 2,865,061.65
5. Step 5: Solve for x
   x = 2,865,061.65/1,531.63
6. Step 6: Final answer
   x = 1,870.60