Finding the Fourth Proportional to 456,912.72, 685,474.17 and 153,347.15

Step by Step Solution

1. Step 1: Write the proportion equation
   456,912.72 : 685,474.17 = 153,347.15 : x
2. Step 2: Convert to fraction form
   456,912.72/685,474.17 = 153,347.15/x
3. Step 3: Cross multiply
   456,912.72x = 685,474.17 × 153,347.15
4. Step 4: Simplify right side
   456,912.72x = 105,115,506,940.75
5. Step 5: Solve for x
   x = 105,115,506,940.75/456,912.72
6. Step 6: Final answer
   x = 230,055.99