Finding the Fourth Proportional to 101,131.02, 139,501.89 and 64,819.53

Step by Step Solution

1. Step 1: Write the proportion equation
   101,131.02 : 139,501.89 = 64,819.53 : x
2. Step 2: Convert to fraction form
   101,131.02/139,501.89 = 64,819.53/x
3. Step 3: Cross multiply
   101,131.02x = 139,501.89 × 64,819.53
4. Step 4: Simplify right side
   101,131.02x = 9,042,446,943.91
5. Step 5: Solve for x
   x = 9,042,446,943.91/101,131.02
6. Step 6: Final answer
   x = 89,413.19