Finding the Fourth Proportional to 139,088.25, 208,667.34 and 64,261.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,088.25 : 208,667.34 = 64,261.35 : x
2. Step 2: Convert to fraction form
   139,088.25/208,667.34 = 64,261.35/x
3. Step 3: Cross multiply
   139,088.25x = 208,667.34 × 64,261.35
4. Step 4: Simplify right side
   139,088.25x = 13,409,244,969.31
5. Step 5: Solve for x
   x = 13,409,244,969.31/139,088.25
6. Step 6: Final answer
   x = 96,408.18