Finding the Fourth Proportional to 101,009.73, 139,386.87 and 55,688.09

Step by Step Solution

1. Step 1: Write the proportion equation
   101,009.73 : 139,386.87 = 55,688.09 : x
2. Step 2: Convert to fraction form
   101,009.73/139,386.87 = 55,688.09/x
3. Step 3: Cross multiply
   101,009.73x = 139,386.87 × 55,688.09
4. Step 4: Simplify right side
   101,009.73x = 7,762,188,561.38
5. Step 5: Solve for x
   x = 7,762,188,561.38/101,009.73
6. Step 6: Final answer
   x = 76,845.95