Finding the Fourth Proportional to 129,484.42, 178,705.53 and 72,906.82

Step by Step Solution

1. Step 1: Write the proportion equation
   129,484.42 : 178,705.53 = 72,906.82 : x
2. Step 2: Convert to fraction form
   129,484.42/178,705.53 = 72,906.82/x
3. Step 3: Cross multiply
   129,484.42x = 178,705.53 × 72,906.82
4. Step 4: Simplify right side
   129,484.42x = 13,028,851,908.71
5. Step 5: Solve for x
   x = 13,028,851,908.71/129,484.42
6. Step 6: Final answer
   x = 100,621.00