Finding the Fourth Proportional to 66,053.89, 91,109.22 and 42,169.80

Step by Step Solution

1. Step 1: Write the proportion equation
   66,053.89 : 91,109.22 = 42,169.80 : x
2. Step 2: Convert to fraction form
   66,053.89/91,109.22 = 42,169.80/x
3. Step 3: Cross multiply
   66,053.89x = 91,109.22 × 42,169.80
4. Step 4: Simplify right side
   66,053.89x = 3,842,057,967.11
5. Step 5: Solve for x
   x = 3,842,057,967.11/66,053.89
6. Step 6: Final answer
   x = 58,165.50