Finding the Fourth Proportional to 1,903.86, 2,856.72 and 929.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.86 : 2,856.72 = 929.43 : x
2. Step 2: Convert to fraction form
   1,903.86/2,856.72 = 929.43/x
3. Step 3: Cross multiply
   1,903.86x = 2,856.72 × 929.43
4. Step 4: Simplify right side
   1,903.86x = 2,655,121.27
5. Step 5: Solve for x
   x = 2,655,121.27/1,903.86
6. Step 6: Final answer
   x = 1,394.60