Finding the Fourth Proportional to 105,111.28, 145,053.50 and 67,385.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105,111.28 : 145,053.50 = 67,385.52 : x
2. Step 2: Convert to fraction form
   105,111.28/145,053.50 = 67,385.52/x
3. Step 3: Cross multiply
   105,111.28x = 145,053.50 × 67,385.52
4. Step 4: Simplify right side
   105,111.28x = 9,774,505,525.32
5. Step 5: Solve for x
   x = 9,774,505,525.32/105,111.28
6. Step 6: Final answer
   x = 92,991.98