Finding the Fourth Proportional to 123,520.15, 170,459.15 and 72,533.48

Step by Step Solution

1. Step 1: Write the proportion equation
   123,520.15 : 170,459.15 = 72,533.48 : x
2. Step 2: Convert to fraction form
   123,520.15/170,459.15 = 72,533.48/x
3. Step 3: Cross multiply
   123,520.15x = 170,459.15 × 72,533.48
4. Step 4: Simplify right side
   123,520.15x = 12,363,995,347.34
5. Step 5: Solve for x
   x = 12,363,995,347.34/123,520.15
6. Step 6: Final answer
   x = 100,096.99