Finding the Fourth Proportional to 105,031.94, 157,487.42 and 45,839.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,031.94 : 157,487.42 = 45,839.30 : x
2. Step 2: Convert to fraction form
   105,031.94/157,487.42 = 45,839.30/x
3. Step 3: Cross multiply
   105,031.94x = 157,487.42 × 45,839.30
4. Step 4: Simplify right side
   105,031.94x = 7,219,112,418.77
5. Step 5: Solve for x
   x = 7,219,112,418.77/105,031.94
6. Step 6: Final answer
   x = 68,732.55