Finding the Fourth Proportional to 229,498.50, 316,737.63 and 128,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   229,498.50 : 316,737.63 = 128,896.50 : x
2. Step 2: Convert to fraction form
   229,498.50/316,737.63 = 128,896.50/x
3. Step 3: Cross multiply
   229,498.50x = 316,737.63 × 128,896.50
4. Step 4: Simplify right side
   229,498.50x = 40,826,371,925.30
5. Step 5: Solve for x
   x = 40,826,371,925.30/229,498.50
6. Step 6: Final answer
   x = 177,893.85