Finding the Fourth Proportional to 105,100.12, 145,042.89 and 59,175.57

Step by Step Solution

1. Step 1: Write the proportion equation
   105,100.12 : 145,042.89 = 59,175.57 : x
2. Step 2: Convert to fraction form
   105,100.12/145,042.89 = 59,175.57/x
3. Step 3: Cross multiply
   105,100.12x = 145,042.89 × 59,175.57
4. Step 4: Simplify right side
   105,100.12x = 8,582,996,411.37
5. Step 5: Solve for x
   x = 8,582,996,411.37/105,100.12
6. Step 6: Final answer
   x = 81,664.95