Finding the Fourth Proportional to 129,298.34, 178,410.93 and 72,706.34

Step by Step Solution

1. Step 1: Write the proportion equation
   129,298.34 : 178,410.93 = 72,706.34 : x
2. Step 2: Convert to fraction form
   129,298.34/178,410.93 = 72,706.34/x
3. Step 3: Cross multiply
   129,298.34x = 178,410.93 × 72,706.34
4. Step 4: Simplify right side
   129,298.34x = 12,971,605,736.30
5. Step 5: Solve for x
   x = 12,971,605,736.30/129,298.34
6. Step 6: Final answer
   x = 100,323.06