Finding the Fourth Proportional to 312,265, 468,410.46 and 90,649

Step by Step Solution

1. Step 1: Write the proportion equation
   312,265 : 468,410.46 = 90,649 : x
2. Step 2: Convert to fraction form
   312,265/468,410.46 = 90,649/x
3. Step 3: Cross multiply
   312,265x = 468,410.46 × 90,649
4. Step 4: Simplify right side
   312,265x = 42,460,939,788.54
5. Step 5: Solve for x
   x = 42,460,939,788.54/312,265
6. Step 6: Final answer
   x = 135,977.26