Finding the Fourth Proportional to 72,030.40, 99,404.01 and 39,767.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,030.40 : 99,404.01 = 39,767.09 : x
2. Step 2: Convert to fraction form
   72,030.40/99,404.01 = 39,767.09/x
3. Step 3: Cross multiply
   72,030.40x = 99,404.01 × 39,767.09
4. Step 4: Simplify right side
   72,030.40x = 3,953,007,715.01
5. Step 5: Solve for x
   x = 3,953,007,715.01/72,030.40
6. Step 6: Final answer
   x = 54,879.72