Finding the Fourth Proportional to 1,641.89, 2,460.87 and 947.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.89 : 2,460.87 = 947.12 : x
2. Step 2: Convert to fraction form
   1,641.89/2,460.87 = 947.12/x
3. Step 3: Cross multiply
   1,641.89x = 2,460.87 × 947.12
4. Step 4: Simplify right side
   1,641.89x = 2,330,726.89
5. Step 5: Solve for x
   x = 2,330,726.89/1,641.89
6. Step 6: Final answer
   x = 1,419.54