Finding the Fourth Proportional to 78,459.60, 108,272.96 and 42,650.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,459.60 : 108,272.96 = 42,650.50 : x
2. Step 2: Convert to fraction form
   78,459.60/108,272.96 = 42,650.50/x
3. Step 3: Cross multiply
   78,459.60x = 108,272.96 × 42,650.50
4. Step 4: Simplify right side
   78,459.60x = 4,617,895,667.23
5. Step 5: Solve for x
   x = 4,617,895,667.23/78,459.60
6. Step 6: Final answer
   x = 58,856.99