Finding the Fourth Proportional to 139,610.76, 209,439.66 and 64,700.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,610.76 : 209,439.66 = 64,700.52 : x
2. Step 2: Convert to fraction form
   139,610.76/209,439.66 = 64,700.52/x
3. Step 3: Cross multiply
   139,610.76x = 209,439.66 × 64,700.52
4. Step 4: Simplify right side
   139,610.76x = 13,550,854,910.62
5. Step 5: Solve for x
   x = 13,550,854,910.62/139,610.76
6. Step 6: Final answer
   x = 97,061.68