Finding the Fourth Proportional to 139,459.60, 209,167.38 and 60,552.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,459.60 : 209,167.38 = 60,552.64 : x
2. Step 2: Convert to fraction form
   139,459.60/209,167.38 = 60,552.64/x
3. Step 3: Cross multiply
   139,459.60x = 209,167.38 × 60,552.64
4. Step 4: Simplify right side
   139,459.60x = 12,665,637,060.88
5. Step 5: Solve for x
   x = 12,665,637,060.88/139,459.60
6. Step 6: Final answer
   x = 90,819.40