Finding the Fourth Proportional to 1,435.91, 2,150.21 and 947.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.91 : 2,150.21 = 947.48 : x
2. Step 2: Convert to fraction form
   1,435.91/2,150.21 = 947.48/x
3. Step 3: Cross multiply
   1,435.91x = 2,150.21 × 947.48
4. Step 4: Simplify right side
   1,435.91x = 2,037,265.48
5. Step 5: Solve for x
   x = 2,037,265.48/1,435.91
6. Step 6: Final answer
   x = 1,418.80