Finding the Fourth Proportional to 139,309.86, 209,000.16 and 64,483.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,309.86 : 209,000.16 = 64,483.98 : x
2. Step 2: Convert to fraction form
   139,309.86/209,000.16 = 64,483.98/x
3. Step 3: Cross multiply
   139,309.86x = 209,000.16 × 64,483.98
4. Step 4: Simplify right side
   139,309.86x = 13,477,162,137.44
5. Step 5: Solve for x
   x = 13,477,162,137.44/139,309.86
6. Step 6: Final answer
   x = 96,742.34