Finding the Fourth Proportional to 123,089.80, 184,488.90 and 91,888.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,089.80 : 184,488.90 = 91,888.60 : x
2. Step 2: Convert to fraction form
   123,089.80/184,488.90 = 91,888.60/x
3. Step 3: Cross multiply
   123,089.80x = 184,488.90 × 91,888.60
4. Step 4: Simplify right side
   123,089.80x = 16,952,426,736.54
5. Step 5: Solve for x
   x = 16,952,426,736.54/123,089.80
6. Step 6: Final answer
   x = 137,724.06