Finding the Fourth Proportional to 231,933.47, 320,012.72 and 135,078.53

Step by Step Solution

1. Step 1: Write the proportion equation
   231,933.47 : 320,012.72 = 135,078.53 : x
2. Step 2: Convert to fraction form
   231,933.47/320,012.72 = 135,078.53/x
3. Step 3: Cross multiply
   231,933.47x = 320,012.72 × 135,078.53
4. Step 4: Simplify right side
   231,933.47x = 43,226,845,523.45
5. Step 5: Solve for x
   x = 43,226,845,523.45/231,933.47
6. Step 6: Final answer
   x = 186,376.06