Finding the Fourth Proportional to 123,992.51, 171,128.34 and 75,622.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,992.51 : 171,128.34 = 75,622.50 : x
2. Step 2: Convert to fraction form
   123,992.51/171,128.34 = 75,622.50/x
3. Step 3: Cross multiply
   123,992.51x = 171,128.34 × 75,622.50
4. Step 4: Simplify right side
   123,992.51x = 12,941,152,891.65
5. Step 5: Solve for x
   x = 12,941,152,891.65/123,992.51
6. Step 6: Final answer
   x = 104,370.44