Finding the Fourth Proportional to 258,937.32, 388,499.52 and 90,482.52

Step by Step Solution

1. Step 1: Write the proportion equation
   258,937.32 : 388,499.52 = 90,482.52 : x
2. Step 2: Convert to fraction form
   258,937.32/388,499.52 = 90,482.52/x
3. Step 3: Cross multiply
   258,937.32x = 388,499.52 × 90,482.52
4. Step 4: Simplify right side
   258,937.32x = 35,152,415,588.39
5. Step 5: Solve for x
   x = 35,152,415,588.39/258,937.32
6. Step 6: Final answer
   x = 135,756.47