Finding the Fourth Proportional to 139,835.30, 192,971.73 and 76,173.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,835.30 : 192,971.73 = 76,173.10 : x
2. Step 2: Convert to fraction form
   139,835.30/192,971.73 = 76,173.10/x
3. Step 3: Cross multiply
   139,835.30x = 192,971.73 × 76,173.10
4. Step 4: Simplify right side
   139,835.30x = 14,699,254,505.60
5. Step 5: Solve for x
   x = 14,699,254,505.60/139,835.30
6. Step 6: Final answer
   x = 105,118.34