Finding the Fourth Proportional to 105,573.18, 145,635.76 and 65,274.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,573.18 : 145,635.76 = 65,274.06 : x
2. Step 2: Convert to fraction form
   105,573.18/145,635.76 = 65,274.06/x
3. Step 3: Cross multiply
   105,573.18x = 145,635.76 × 65,274.06
4. Step 4: Simplify right side
   105,573.18x = 9,506,237,336.39
5. Step 5: Solve for x
   x = 9,506,237,336.39/105,573.18
6. Step 6: Final answer
   x = 90,044.06