Finding the Fourth Proportional to 101,131.07, 139,501.94 and 64,819.58

Step by Step Solution

1. Step 1: Write the proportion equation
   101,131.07 : 139,501.94 = 64,819.58 : x
2. Step 2: Convert to fraction form
   101,131.07/139,501.94 = 64,819.58/x
3. Step 3: Cross multiply
   101,131.07x = 139,501.94 × 64,819.58
4. Step 4: Simplify right side
   101,131.07x = 9,042,456,138.38
5. Step 5: Solve for x
   x = 9,042,456,138.38/101,131.07
6. Step 6: Final answer
   x = 89,413.24