Finding the Fourth Proportional to 1,437.78, 1,981.85 and 1,087.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.78 : 1,981.85 = 1,087.86 : x
2. Step 2: Convert to fraction form
   1,437.78/1,981.85 = 1,087.86/x
3. Step 3: Cross multiply
   1,437.78x = 1,981.85 × 1,087.86
4. Step 4: Simplify right side
   1,437.78x = 2,155,975.34
5. Step 5: Solve for x
   x = 2,155,975.34/1,437.78
6. Step 6: Final answer
   x = 1,499.52