Finding the Fourth Proportional to 139,803.99, 209,626.02 and 64,885.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,803.99 : 209,626.02 = 64,885.56 : x
2. Step 2: Convert to fraction form
   139,803.99/209,626.02 = 64,885.56/x
3. Step 3: Cross multiply
   139,803.99x = 209,626.02 × 64,885.56
4. Step 4: Simplify right side
   139,803.99x = 13,601,701,698.27
5. Step 5: Solve for x
   x = 13,601,701,698.27/139,803.99
6. Step 6: Final answer
   x = 97,291.23