Finding the Fourth Proportional to 105,143.16, 145,095.69 and 59,820.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,143.16 : 145,095.69 = 59,820.17 : x
2. Step 2: Convert to fraction form
   105,143.16/145,095.69 = 59,820.17/x
3. Step 3: Cross multiply
   105,143.16x = 145,095.69 × 59,820.17
4. Step 4: Simplify right side
   105,143.16x = 8,679,648,842.07
5. Step 5: Solve for x
   x = 8,679,648,842.07/105,143.16
6. Step 6: Final answer
   x = 82,550.77