Finding the Fourth Proportional to 309,513.60, 464,335.20 and 122,526.72

Step by Step Solution

1. Step 1: Write the proportion equation
   309,513.60 : 464,335.20 = 122,526.72 : x
2. Step 2: Convert to fraction form
   309,513.60/464,335.20 = 122,526.72/x
3. Step 3: Cross multiply
   309,513.60x = 464,335.20 × 122,526.72
4. Step 4: Simplify right side
   309,513.60x = 56,893,469,036.54
5. Step 5: Solve for x
   x = 56,893,469,036.54/309,513.60
6. Step 6: Final answer
   x = 183,815.73