Finding the Fourth Proportional to 72,962.78, 109,379.57 and 28,621.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,962.78 : 109,379.57 = 28,621.35 : x
2. Step 2: Convert to fraction form
   72,962.78/109,379.57 = 28,621.35/x
3. Step 3: Cross multiply
   72,962.78x = 109,379.57 × 28,621.35
4. Step 4: Simplify right side
   72,962.78x = 3,130,590,812.71
5. Step 5: Solve for x
   x = 3,130,590,812.71/72,962.78
6. Step 6: Final answer
   x = 42,906.69