Finding the Fourth Proportional to 72,191.83, 99,621.85 and 39,924.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,191.83 : 99,621.85 = 39,924.34 : x
2. Step 2: Convert to fraction form
   72,191.83/99,621.85 = 39,924.34/x
3. Step 3: Cross multiply
   72,191.83x = 99,621.85 × 39,924.34
4. Step 4: Simplify right side
   72,191.83x = 3,977,336,610.83
5. Step 5: Solve for x
   x = 3,977,336,610.83/72,191.83
6. Step 6: Final answer
   x = 55,094.00