Finding the Fourth Proportional to 123,400.10, 184,992.15 and 83,828.90

Step by Step Solution

1. Step 1: Write the proportion equation
   123,400.10 : 184,992.15 = 83,828.90 : x
2. Step 2: Convert to fraction form
   123,400.10/184,992.15 = 83,828.90/x
3. Step 3: Cross multiply
   123,400.10x = 184,992.15 × 83,828.90
4. Step 4: Simplify right side
   123,400.10x = 15,507,688,443.14
5. Step 5: Solve for x
   x = 15,507,688,443.14/123,400.10
6. Step 6: Final answer
   x = 125,669.98