Finding the Fourth Proportional to 1,434.22, 2,151.32 and 947.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.22 : 2,151.32 = 947.15 : x
2. Step 2: Convert to fraction form
   1,434.22/2,151.32 = 947.15/x
3. Step 3: Cross multiply
   1,434.22x = 2,151.32 × 947.15
4. Step 4: Simplify right side
   1,434.22x = 2,037,623.38
5. Step 5: Solve for x
   x = 2,037,623.38/1,434.22
6. Step 6: Final answer
   x = 1,420.72