Finding the Fourth Proportional to 123,390.54, 185,311.80 and 112,980.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,390.54 : 185,311.80 = 112,980.42 : x
2. Step 2: Convert to fraction form
   123,390.54/185,311.80 = 112,980.42/x
3. Step 3: Cross multiply
   123,390.54x = 185,311.80 × 112,980.42
4. Step 4: Simplify right side
   123,390.54x = 20,936,604,994.96
5. Step 5: Solve for x
   x = 20,936,604,994.96/123,390.54
6. Step 6: Final answer
   x = 169,677.55