Finding the Fourth Proportional to 1,905.56, 2,856.72 and 752.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,905.56 : 2,856.72 = 752.12 : x
2. Step 2: Convert to fraction form
   1,905.56/2,856.72 = 752.12/x
3. Step 3: Cross multiply
   1,905.56x = 2,856.72 × 752.12
4. Step 4: Simplify right side
   1,905.56x = 2,148,596.25
5. Step 5: Solve for x
   x = 2,148,596.25/1,905.56
6. Step 6: Final answer
   x = 1,127.54