Finding the Fourth Proportional to 139,048.77, 208,412.51 and 64,011.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,048.77 : 208,412.51 = 64,011.59 : x
2. Step 2: Convert to fraction form
   139,048.77/208,412.51 = 64,011.59/x
3. Step 3: Cross multiply
   139,048.77x = 208,412.51 × 64,011.59
4. Step 4: Simplify right side
   139,048.77x = 13,340,814,778.87
5. Step 5: Solve for x
   x = 13,340,814,778.87/139,048.77
6. Step 6: Final answer
   x = 95,943.42