Finding the Fourth Proportional to 72,612.54, 108,995.13 and 64,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,612.54 : 108,995.13 = 64,345.50 : x
2. Step 2: Convert to fraction form
   72,612.54/108,995.13 = 64,345.50/x
3. Step 3: Cross multiply
   72,612.54x = 108,995.13 × 64,345.50
4. Step 4: Simplify right side
   72,612.54x = 7,013,346,137.42
5. Step 5: Solve for x
   x = 7,013,346,137.42/72,612.54
6. Step 6: Final answer
   x = 96,585.88