Finding the Fourth Proportional to 311,904, 467,933.94 and 90,288

Step by Step Solution

1. Step 1: Write the proportion equation
   311,904 : 467,933.94 = 90,288 : x
2. Step 2: Convert to fraction form
   311,904/467,933.94 = 90,288/x
3. Step 3: Cross multiply
   311,904x = 467,933.94 × 90,288
4. Step 4: Simplify right side
   311,904x = 42,248,819,574.72
5. Step 5: Solve for x
   x = 42,248,819,574.72/311,904
6. Step 6: Final answer
   x = 135,454.56