Finding the Fourth Proportional to 139,538.93, 192,579.96 and 78,302.00

Step by Step Solution

1. Step 1: Write the proportion equation
   139,538.93 : 192,579.96 = 78,302.00 : x
2. Step 2: Convert to fraction form
   139,538.93/192,579.96 = 78,302.00/x
3. Step 3: Cross multiply
   139,538.93x = 192,579.96 × 78,302.00
4. Step 4: Simplify right side
   139,538.93x = 15,079,395,065.02
5. Step 5: Solve for x
   x = 15,079,395,065.02/139,538.93
6. Step 6: Final answer
   x = 108,065.87