Finding the Fourth Proportional to 105,111.25, 145,053.54 and 67,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,111.25 : 145,053.54 = 67,385.50 : x
2. Step 2: Convert to fraction form
   105,111.25/145,053.54 = 67,385.50/x
3. Step 3: Cross multiply
   105,111.25x = 145,053.54 × 67,385.50
4. Step 4: Simplify right side
   105,111.25x = 9,774,505,319.67
5. Step 5: Solve for x
   x = 9,774,505,319.67/105,111.25
6. Step 6: Final answer
   x = 92,992.00