Finding the Fourth Proportional to 72,189.77, 99,619.01 and 39,922.29

Step by Step Solution

1. Step 1: Write the proportion equation
   72,189.77 : 99,619.01 = 39,922.29 : x
2. Step 2: Convert to fraction form
   72,189.77/99,619.01 = 39,922.29/x
3. Step 3: Cross multiply
   72,189.77x = 99,619.01 × 39,922.29
4. Step 4: Simplify right side
   72,189.77x = 3,977,018,807.12
5. Step 5: Solve for x
   x = 3,977,018,807.12/72,189.77
6. Step 6: Final answer
   x = 55,091.17