Finding the Fourth Proportional to 1,642.03, 2,459.35 and 947.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.03 : 2,459.35 = 947.05 : x
2. Step 2: Convert to fraction form
   1,642.03/2,459.35 = 947.05/x
3. Step 3: Cross multiply
   1,642.03x = 2,459.35 × 947.05
4. Step 4: Simplify right side
   1,642.03x = 2,329,127.42
5. Step 5: Solve for x
   x = 2,329,127.42/1,642.03
6. Step 6: Final answer
   x = 1,418.44