Finding the Fourth Proportional to 1,438.59, 1,985.41 and 914.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.59 : 1,985.41 = 914.63 : x
2. Step 2: Convert to fraction form
   1,438.59/1,985.41 = 914.63/x
3. Step 3: Cross multiply
   1,438.59x = 1,985.41 × 914.63
4. Step 4: Simplify right side
   1,438.59x = 1,815,906.76
5. Step 5: Solve for x
   x = 1,815,906.76/1,438.59
6. Step 6: Final answer
   x = 1,262.28