Finding the Fourth Proportional to 128,333.15, 177,100.92 and 70,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,333.15 : 177,100.92 = 70,969.50 : x
2. Step 2: Convert to fraction form
   128,333.15/177,100.92 = 70,969.50/x
3. Step 3: Cross multiply
   128,333.15x = 177,100.92 × 70,969.50
4. Step 4: Simplify right side
   128,333.15x = 12,568,763,741.94
5. Step 5: Solve for x
   x = 12,568,763,741.94/128,333.15
6. Step 6: Final answer
   x = 97,938.56