Finding the Fourth Proportional to 69,807.39, 104,709.72 and 19,887.81

Step by Step Solution

1. Step 1: Write the proportion equation
   69,807.39 : 104,709.72 = 19,887.81 : x
2. Step 2: Convert to fraction form
   69,807.39/104,709.72 = 19,887.81/x
3. Step 3: Cross multiply
   69,807.39x = 104,709.72 × 19,887.81
4. Step 4: Simplify right side
   69,807.39x = 2,082,447,016.51
5. Step 5: Solve for x
   x = 2,082,447,016.51/69,807.39
6. Step 6: Final answer
   x = 29,831.33