Finding the Fourth Proportional to 69,111.84, 103,667.80 and 19,191.94

Step by Step Solution

1. Step 1: Write the proportion equation
   69,111.84 : 103,667.80 = 19,191.94 : x
2. Step 2: Convert to fraction form
   69,111.84/103,667.80 = 19,191.94/x
3. Step 3: Cross multiply
   69,111.84x = 103,667.80 × 19,191.94
4. Step 4: Simplify right side
   69,111.84x = 1,989,585,890.38
5. Step 5: Solve for x
   x = 1,989,585,890.38/69,111.84
6. Step 6: Final answer
   x = 28,787.92