Finding the Fourth Proportional to 123,328.58, 170,175.20 and 72,322.07

Step by Step Solution

1. Step 1: Write the proportion equation
   123,328.58 : 170,175.20 = 72,322.07 : x
2. Step 2: Convert to fraction form
   123,328.58/170,175.20 = 72,322.07/x
3. Step 3: Cross multiply
   123,328.58x = 170,175.20 × 72,322.07
4. Step 4: Simplify right side
   123,328.58x = 12,307,421,514.18
5. Step 5: Solve for x
   x = 12,307,421,514.18/123,328.58
6. Step 6: Final answer
   x = 99,793.75