Finding the Fourth Proportional to 105,978.24, 146,213.80 and 65,677.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,978.24 : 146,213.80 = 65,677.30 : x
2. Step 2: Convert to fraction form
   105,978.24/146,213.80 = 65,677.30/x
3. Step 3: Cross multiply
   105,978.24x = 146,213.80 × 65,677.30
4. Step 4: Simplify right side
   105,978.24x = 9,602,927,077.01
5. Step 5: Solve for x
   x = 9,602,927,077.01/105,978.24
6. Step 6: Final answer
   x = 90,612.25