Finding the Fourth Proportional to 139,430.82, 208,974.90 and 64,449.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,430.82 : 208,974.90 = 64,449.52 : x
2. Step 2: Convert to fraction form
   139,430.82/208,974.90 = 64,449.52/x
3. Step 3: Cross multiply
   139,430.82x = 208,974.90 × 64,449.52
4. Step 4: Simplify right side
   139,430.82x = 13,468,331,997.05
5. Step 5: Solve for x
   x = 13,468,331,997.05/139,430.82
6. Step 6: Final answer
   x = 96,595.09