Finding the Fourth Proportional to 1,531.24, 2,123.95 and 1,478.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.24 : 2,123.95 = 1,478.79 : x
2. Step 2: Convert to fraction form
   1,531.24/2,123.95 = 1,478.79/x
3. Step 3: Cross multiply
   1,531.24x = 2,123.95 × 1,478.79
4. Step 4: Simplify right side
   1,531.24x = 3,140,876.02
5. Step 5: Solve for x
   x = 3,140,876.02/1,531.24
6. Step 6: Final answer
   x = 2,051.20