Finding the Fourth Proportional to 75,085.48, 103,629.59 and 42,820.17

Step by Step Solution

1. Step 1: Write the proportion equation
   75,085.48 : 103,629.59 = 42,820.17 : x
2. Step 2: Convert to fraction form
   75,085.48/103,629.59 = 42,820.17/x
3. Step 3: Cross multiply
   75,085.48x = 103,629.59 × 42,820.17
4. Step 4: Simplify right side
   75,085.48x = 4,437,436,660.83
5. Step 5: Solve for x
   x = 4,437,436,660.83/75,085.48
6. Step 6: Final answer
   x = 59,098.47