Finding the Fourth Proportional to 108,706.10, 149,978.55 and 65,669.48

Step by Step Solution

1. Step 1: Write the proportion equation
   108,706.10 : 149,978.55 = 65,669.48 : x
2. Step 2: Convert to fraction form
   108,706.10/149,978.55 = 65,669.48/x
3. Step 3: Cross multiply
   108,706.10x = 149,978.55 × 65,669.48
4. Step 4: Simplify right side
   108,706.10x = 9,849,013,389.65
5. Step 5: Solve for x
   x = 9,849,013,389.65/108,706.10
6. Step 6: Final answer
   x = 90,602.21