Finding the Fourth Proportional to 258,066.77, 387,100.02 and 80,588.99

Step by Step Solution

1. Step 1: Write the proportion equation
   258,066.77 : 387,100.02 = 80,588.99 : x
2. Step 2: Convert to fraction form
   258,066.77/387,100.02 = 80,588.99/x
3. Step 3: Cross multiply
   258,066.77x = 387,100.02 × 80,588.99
4. Step 4: Simplify right side
   258,066.77x = 31,196,000,306.32
5. Step 5: Solve for x
   x = 31,196,000,306.32/258,066.77
6. Step 6: Final answer
   x = 120,883.44