Finding the Fourth Proportional to 123,342.40, 184,819.20 and 103,513.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,342.40 : 184,819.20 = 103,513.60 : x
2. Step 2: Convert to fraction form
   123,342.40/184,819.20 = 103,513.60/x
3. Step 3: Cross multiply
   123,342.40x = 184,819.20 × 103,513.60
4. Step 4: Simplify right side
   123,342.40x = 19,131,300,741.12
5. Step 5: Solve for x
   x = 19,131,300,741.12/123,342.40
6. Step 6: Final answer
   x = 155,107.25