Finding the Fourth Proportional to 1,540.02, 2,123.91 and 1,015.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.02 : 2,123.91 = 1,015.50 : x
2. Step 2: Convert to fraction form
   1,540.02/2,123.91 = 1,015.50/x
3. Step 3: Cross multiply
   1,540.02x = 2,123.91 × 1,015.50
4. Step 4: Simplify right side
   1,540.02x = 2,156,830.61
5. Step 5: Solve for x
   x = 2,156,830.61/1,540.02
6. Step 6: Final answer
   x = 1,400.52