Finding the Fourth Proportional to 72,190.83, 99,620.48 and 39,923.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,190.83 : 99,620.48 = 39,923.34 : x
2. Step 2: Convert to fraction form
   72,190.83/99,620.48 = 39,923.34/x
3. Step 3: Cross multiply
   72,190.83x = 99,620.48 × 39,923.34
4. Step 4: Simplify right side
   72,190.83x = 3,977,182,094.39
5. Step 5: Solve for x
   x = 3,977,182,094.39/72,190.83
6. Step 6: Final answer
   x = 55,092.62