Finding the Fourth Proportional to 1,438.63, 1,985.34 and 1,124.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.63 : 1,985.34 = 1,124.25 : x
2. Step 2: Convert to fraction form
   1,438.63/1,985.34 = 1,124.25/x
3. Step 3: Cross multiply
   1,438.63x = 1,985.34 × 1,124.25
4. Step 4: Simplify right side
   1,438.63x = 2,232,018.50
5. Step 5: Solve for x
   x = 2,232,018.50/1,438.63
6. Step 6: Final answer
   x = 1,551.49