Finding the Fourth Proportional to 105,776.76, 145,971.54 and 65,482.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,776.76 : 145,971.54 = 65,482.50 : x
2. Step 2: Convert to fraction form
   105,776.76/145,971.54 = 65,482.50/x
3. Step 3: Cross multiply
   105,776.76x = 145,971.54 × 65,482.50
4. Step 4: Simplify right side
   105,776.76x = 9,558,581,368.05
5. Step 5: Solve for x
   x = 9,558,581,368.05/105,776.76
6. Step 6: Final answer
   x = 90,365.61