Finding the Fourth Proportional to 105,145.02, 157,656.94 and 71,905.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105,145.02 : 157,656.94 = 71,905.37 : x
2. Step 2: Convert to fraction form
   105,145.02/157,656.94 = 71,905.37/x
3. Step 3: Cross multiply
   105,145.02x = 157,656.94 × 71,905.37
4. Step 4: Simplify right side
   105,145.02x = 11,336,379,635.72
5. Step 5: Solve for x
   x = 11,336,379,635.72/105,145.02
6. Step 6: Final answer
   x = 107,816.61