Finding the Fourth Proportional to 71,738.72, 107,601.48 and 19,146.32

Step by Step Solution

1. Step 1: Write the proportion equation
   71,738.72 : 107,601.48 = 19,146.32 : x
2. Step 2: Convert to fraction form
   71,738.72/107,601.48 = 19,146.32/x
3. Step 3: Cross multiply
   71,738.72x = 107,601.48 × 19,146.32
4. Step 4: Simplify right side
   71,738.72x = 2,060,172,368.55
5. Step 5: Solve for x
   x = 2,060,172,368.55/71,738.72
6. Step 6: Final answer
   x = 28,717.72