Finding the Fourth Proportional to 2,623.47, 3,933.99 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.47 : 3,933.99 = 978.84 : x
2. Step 2: Convert to fraction form
   2,623.47/3,933.99 = 978.84/x
3. Step 3: Cross multiply
   2,623.47x = 3,933.99 × 978.84
4. Step 4: Simplify right side
   2,623.47x = 3,850,746.77
5. Step 5: Solve for x
   x = 3,850,746.77/2,623.47
6. Step 6: Final answer
   x = 1,467.81