Finding the Fourth Proportional to 123,548.69, 170,468.55 and 72,558.79

Step by Step Solution

1. Step 1: Write the proportion equation
   123,548.69 : 170,468.55 = 72,558.79 : x
2. Step 2: Convert to fraction form
   123,548.69/170,468.55 = 72,558.79/x
3. Step 3: Cross multiply
   123,548.69x = 170,468.55 × 72,558.79
4. Step 4: Simplify right side
   123,548.69x = 12,368,991,294.88
5. Step 5: Solve for x
   x = 12,368,991,294.88/123,548.69
6. Step 6: Final answer
   x = 100,114.30