Finding the Fourth Proportional to 154,405, 213,078.90 and 83,749

Step by Step Solution

1. Step 1: Write the proportion equation
   154,405 : 213,078.90 = 83,749 : x
2. Step 2: Convert to fraction form
   154,405/213,078.90 = 83,749/x
3. Step 3: Cross multiply
   154,405x = 213,078.90 × 83,749
4. Step 4: Simplify right side
   154,405x = 17,845,144,796.10
5. Step 5: Solve for x
   x = 17,845,144,796.10/154,405
6. Step 6: Final answer
   x = 115,573.62