Finding the Fourth Proportional to 139,054.53, 191,896.73 and 81,696.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,054.53 : 191,896.73 = 81,696.24 : x
2. Step 2: Convert to fraction form
   139,054.53/191,896.73 = 81,696.24/x
3. Step 3: Cross multiply
   139,054.53x = 191,896.73 × 81,696.24
4. Step 4: Simplify right side
   139,054.53x = 15,677,240,900.81
5. Step 5: Solve for x
   x = 15,677,240,900.81/139,054.53
6. Step 6: Final answer
   x = 112,741.68