Finding the Fourth Proportional to 123,091.80, 184,491.90 and 91,890.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,091.80 : 184,491.90 = 91,890.60 : x
2. Step 2: Convert to fraction form
   123,091.80/184,491.90 = 91,890.60/x
3. Step 3: Cross multiply
   123,091.80x = 184,491.90 × 91,890.60
4. Step 4: Simplify right side
   123,091.80x = 16,953,071,386.14
5. Step 5: Solve for x
   x = 16,953,071,386.14/123,091.80
6. Step 6: Final answer
   x = 137,727.06