Finding the Fourth Proportional to 139,408.07, 208,994.55 and 60,462.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,408.07 : 208,994.55 = 60,462.84 : x
2. Step 2: Convert to fraction form
   139,408.07/208,994.55 = 60,462.84/x
3. Step 3: Cross multiply
   139,408.07x = 208,994.55 × 60,462.84
4. Step 4: Simplify right side
   139,408.07x = 12,636,402,992.55
5. Step 5: Solve for x
   x = 12,636,402,992.55/139,408.07
6. Step 6: Final answer
   x = 90,643.27