Finding the Fourth Proportional to 978,414.30, 1,467,621.45 and 891,323.10

Step by Step Solution

1. Step 1: Write the proportion equation
   978,414.30 : 1,467,621.45 = 891,323.10 : x
2. Step 2: Convert to fraction form
   978,414.30/1,467,621.45 = 891,323.10/x
3. Step 3: Cross multiply
   978,414.30x = 1,467,621.45 × 891,323.10
4. Step 4: Simplify right side
   978,414.30x = 1,308,124,900,440.49
5. Step 5: Solve for x
   x = 1,308,124,900,440.49/978,414.30
6. Step 6: Final answer
   x = 1,336,984.65