Finding the Fourth Proportional to 483,653.72, 725,479.72 and 128,667.74

Step by Step Solution

1. Step 1: Write the proportion equation
   483,653.72 : 725,479.72 = 128,667.74 : x
2. Step 2: Convert to fraction form
   483,653.72/725,479.72 = 128,667.74/x
3. Step 3: Cross multiply
   483,653.72x = 725,479.72 × 128,667.74
4. Step 4: Simplify right side
   483,653.72x = 93,345,831,717.50
5. Step 5: Solve for x
   x = 93,345,831,717.50/483,653.72
6. Step 6: Final answer
   x = 193,001.37