Finding the Fourth Proportional to 456,776.77, 685,259.71 and 136,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   456,776.77 : 685,259.71 = 136,915.72 : x
2. Step 2: Convert to fraction form
   456,776.77/685,259.71 = 136,915.72/x
3. Step 3: Cross multiply
   456,776.77x = 685,259.71 × 136,915.72
4. Step 4: Simplify right side
   456,776.77x = 93,822,827,223.65
5. Step 5: Solve for x
   x = 93,822,827,223.65/456,776.77
6. Step 6: Final answer
   x = 205,401.92