Finding the Fourth Proportional to 223,681.30, 308,662.05 and 128,196.34

Step by Step Solution

1. Step 1: Write the proportion equation
   223,681.30 : 308,662.05 = 128,196.34 : x
2. Step 2: Convert to fraction form
   223,681.30/308,662.05 = 128,196.34/x
3. Step 3: Cross multiply
   223,681.30x = 308,662.05 × 128,196.34
4. Step 4: Simplify right side
   223,681.30x = 39,569,345,106.90
5. Step 5: Solve for x
   x = 39,569,345,106.90/223,681.30
6. Step 6: Final answer
   x = 176,900.55