Finding the Fourth Proportional to 53,128.69, 73,317.59 and 29,255.30

Step by Step Solution

1. Step 1: Write the proportion equation
   53,128.69 : 73,317.59 = 29,255.30 : x
2. Step 2: Convert to fraction form
   53,128.69/73,317.59 = 29,255.30/x
3. Step 3: Cross multiply
   53,128.69x = 73,317.59 × 29,255.30
4. Step 4: Simplify right side
   53,128.69x = 2,144,928,374.92
5. Step 5: Solve for x
   x = 2,144,928,374.92/53,128.69
6. Step 6: Final answer
   x = 40,372.32