Finding the Fourth Proportional to 105,297.86, 145,311.03 and 59,980.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,297.86 : 145,311.03 = 59,980.05 : x
2. Step 2: Convert to fraction form
   105,297.86/145,311.03 = 59,980.05/x
3. Step 3: Cross multiply
   105,297.86x = 145,311.03 × 59,980.05
4. Step 4: Simplify right side
   105,297.86x = 8,715,762,844.95
5. Step 5: Solve for x
   x = 8,715,762,844.95/105,297.86
6. Step 6: Final answer
   x = 82,772.46