Finding the Fourth Proportional to 69,100.47, 103,658.12 and 19,180.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69,100.47 : 103,658.12 = 19,180.78 : x
2. Step 2: Convert to fraction form
   69,100.47/103,658.12 = 19,180.78/x
3. Step 3: Cross multiply
   69,100.47x = 103,658.12 × 19,180.78
4. Step 4: Simplify right side
   69,100.47x = 1,988,243,499.03
5. Step 5: Solve for x
   x = 1,988,243,499.03/69,100.47
6. Step 6: Final answer
   x = 28,773.23