Finding the Fourth Proportional to 123,074.90, 169,845.54 and 72,124.28

Step by Step Solution

1. Step 1: Write the proportion equation
   123,074.90 : 169,845.54 = 72,124.28 : x
2. Step 2: Convert to fraction form
   123,074.90/169,845.54 = 72,124.28/x
3. Step 3: Cross multiply
   123,074.90x = 169,845.54 × 72,124.28
4. Step 4: Simplify right side
   123,074.90x = 12,249,987,283.71
5. Step 5: Solve for x
   x = 12,249,987,283.71/123,074.90
6. Step 6: Final answer
   x = 99,532.78