Finding the Fourth Proportional to 128,118.25, 176,804.50 and 70,759

Step by Step Solution

1. Step 1: Write the proportion equation
   128,118.25 : 176,804.50 = 70,759 : x
2. Step 2: Convert to fraction form
   128,118.25/176,804.50 = 70,759/x
3. Step 3: Cross multiply
   128,118.25x = 176,804.50 × 70,759
4. Step 4: Simplify right side
   128,118.25x = 12,510,509,615.50
5. Step 5: Solve for x
   x = 12,510,509,615.50/128,118.25
6. Step 6: Final answer
   x = 97,648.15