Finding the Fourth Proportional to 105,142.16, 145,094.31 and 59,819.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,142.16 : 145,094.31 = 59,819.17 : x
2. Step 2: Convert to fraction form
   105,142.16/145,094.31 = 59,819.17/x
3. Step 3: Cross multiply
   105,142.16x = 145,094.31 × 59,819.17
4. Step 4: Simplify right side
   105,142.16x = 8,679,421,195.92
5. Step 5: Solve for x
   x = 8,679,421,195.92/105,142.16
6. Step 6: Final answer
   x = 82,549.39