Finding the Fourth Proportional to 139,058.94, 208,421.55 and 64,076.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,058.94 : 208,421.55 = 64,076.16 : x
2. Step 2: Convert to fraction form
   139,058.94/208,421.55 = 64,076.16/x
3. Step 3: Cross multiply
   139,058.94x = 208,421.55 × 64,076.16
4. Step 4: Simplify right side
   139,058.94x = 13,354,852,585.25
5. Step 5: Solve for x
   x = 13,354,852,585.25/139,058.94
6. Step 6: Final answer
   x = 96,037.35