Finding the Fourth Proportional to 487,978.45, 673,410.18 and 273,118.51

Step by Step Solution

1. Step 1: Write the proportion equation
   487,978.45 : 673,410.18 = 273,118.51 : x
2. Step 2: Convert to fraction form
   487,978.45/673,410.18 = 273,118.51/x
3. Step 3: Cross multiply
   487,978.45x = 673,410.18 × 273,118.51
4. Step 4: Simplify right side
   487,978.45x = 183,920,784,980.43
5. Step 5: Solve for x
   x = 183,920,784,980.43/487,978.45
6. Step 6: Final answer
   x = 376,903.50