Finding the Fourth Proportional to 123,075.40, 169,846.23 and 72,124.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,075.40 : 169,846.23 = 72,124.78 : x
2. Step 2: Convert to fraction form
   123,075.40/169,846.23 = 72,124.78/x
3. Step 3: Cross multiply
   123,075.40x = 169,846.23 × 72,124.78
4. Step 4: Simplify right side
   123,075.40x = 12,250,121,972.58
5. Step 5: Solve for x
   x = 12,250,121,972.58/123,075.40
6. Step 6: Final answer
   x = 99,533.47