Finding the Fourth Proportional to 123,782.21, 170,822.17 and 75,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,782.21 : 170,822.17 = 75,386.42 : x
2. Step 2: Convert to fraction form
   123,782.21/170,822.17 = 75,386.42/x
3. Step 3: Cross multiply
   123,782.21x = 170,822.17 × 75,386.42
4. Step 4: Simplify right side
   123,782.21x = 12,877,671,852.93
5. Step 5: Solve for x
   x = 12,877,671,852.93/123,782.21
6. Step 6: Final answer
   x = 104,034.92