Finding the Fourth Proportional to 72,921.38, 100,644.56 and 42,704.93

Step by Step Solution

1. Step 1: Write the proportion equation
   72,921.38 : 100,644.56 = 42,704.93 : x
2. Step 2: Convert to fraction form
   72,921.38/100,644.56 = 42,704.93/x
3. Step 3: Cross multiply
   72,921.38x = 100,644.56 × 42,704.93
4. Step 4: Simplify right side
   72,921.38x = 4,298,018,172.93
5. Step 5: Solve for x
   x = 4,298,018,172.93/72,921.38
6. Step 6: Final answer
   x = 58,940.44