Finding the Fourth Proportional to 1,445.78, 1,994.63 and 948.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.78 : 1,994.63 = 948.69 : x
2. Step 2: Convert to fraction form
   1,445.78/1,994.63 = 948.69/x
3. Step 3: Cross multiply
   1,445.78x = 1,994.63 × 948.69
4. Step 4: Simplify right side
   1,445.78x = 1,892,285.53
5. Step 5: Solve for x
   x = 1,892,285.53/1,445.78
6. Step 6: Final answer
   x = 1,308.84