Finding the Fourth Proportional to 139,758.51, 192,869.08 and 79,331.01

Step by Step Solution

1. Step 1: Write the proportion equation
   139,758.51 : 192,869.08 = 79,331.01 : x
2. Step 2: Convert to fraction form
   139,758.51/192,869.08 = 79,331.01/x
3. Step 3: Cross multiply
   139,758.51x = 192,869.08 × 79,331.01
4. Step 4: Simplify right side
   139,758.51x = 15,300,499,523.71
5. Step 5: Solve for x
   x = 15,300,499,523.71/139,758.51
6. Step 6: Final answer
   x = 109,478.12