Finding the Fourth Proportional to 258,066, 387,131.81 and 71,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,066 : 387,131.81 = 71,077.50 : x
2. Step 2: Convert to fraction form
   258,066/387,131.81 = 71,077.50/x
3. Step 3: Cross multiply
   258,066x = 387,131.81 × 71,077.50
4. Step 4: Simplify right side
   258,066x = 27,516,360,869.89
5. Step 5: Solve for x
   x = 27,516,360,869.89/258,066
6. Step 6: Final answer
   x = 106,625.29