Finding the Fourth Proportional to 105,468.86, 145,395.65 and 75,201.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,468.86 : 145,395.65 = 75,201.72 : x
2. Step 2: Convert to fraction form
   105,468.86/145,395.65 = 75,201.72/x
3. Step 3: Cross multiply
   105,468.86x = 145,395.65 × 75,201.72
4. Step 4: Simplify right side
   105,468.86x = 10,934,003,148.52
5. Step 5: Solve for x
   x = 10,934,003,148.52/105,468.86
6. Step 6: Final answer
   x = 103,670.45