Finding the Fourth Proportional to 102,913, 142,019.94 and 55,809

Step by Step Solution

1. Step 1: Write the proportion equation
   102,913 : 142,019.94 = 55,809 : x
2. Step 2: Convert to fraction form
   102,913/142,019.94 = 55,809/x
3. Step 3: Cross multiply
   102,913x = 142,019.94 × 55,809
4. Step 4: Simplify right side
   102,913x = 7,925,990,831.46
5. Step 5: Solve for x
   x = 7,925,990,831.46/102,913
6. Step 6: Final answer
   x = 77,016.42