Finding the Fourth Proportional to 1,434.18, 2,151.25 and 947.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.18 : 2,151.25 = 947.10 : x
2. Step 2: Convert to fraction form
   1,434.18/2,151.25 = 947.10/x
3. Step 3: Cross multiply
   1,434.18x = 2,151.25 × 947.10
4. Step 4: Simplify right side
   1,434.18x = 2,037,446.51
5. Step 5: Solve for x
   x = 2,037,446.51/1,434.18
6. Step 6: Final answer
   x = 1,420.64