Finding the Fourth Proportional to 224,112.72, 309,256.32 and 128,617.32

Step by Step Solution

1. Step 1: Write the proportion equation
   224,112.72 : 309,256.32 = 128,617.32 : x
2. Step 2: Convert to fraction form
   224,112.72/309,256.32 = 128,617.32/x
3. Step 3: Cross multiply
   224,112.72x = 309,256.32 × 128,617.32
4. Step 4: Simplify right side
   224,112.72x = 39,775,719,071.46
5. Step 5: Solve for x
   x = 39,775,719,071.46/224,112.72
6. Step 6: Final answer
   x = 177,480.86