Finding the Fourth Proportional to 231,978.52, 320,115.20 and 136,466.76

Step by Step Solution

1. Step 1: Write the proportion equation
   231,978.52 : 320,115.20 = 136,466.76 : x
2. Step 2: Convert to fraction form
   231,978.52/320,115.20 = 136,466.76/x
3. Step 3: Cross multiply
   231,978.52x = 320,115.20 × 136,466.76
4. Step 4: Simplify right side
   231,978.52x = 43,685,084,170.75
5. Step 5: Solve for x
   x = 43,685,084,170.75/231,978.52
6. Step 6: Final answer
   x = 188,315.21