Finding the Fourth Proportional to 139,047.39, 208,633.10 and 64,127.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,047.39 : 208,633.10 = 64,127.25 : x
2. Step 2: Convert to fraction form
   139,047.39/208,633.10 = 64,127.25/x
3. Step 3: Cross multiply
   139,047.39x = 208,633.10 × 64,127.25
4. Step 4: Simplify right side
   139,047.39x = 13,379,066,641.34
5. Step 5: Solve for x
   x = 13,379,066,641.34/139,047.39
6. Step 6: Final answer
   x = 96,219.47