Finding the Fourth Proportional to 113,788.81, 156,939.81 and 72,956.83

Step by Step Solution

1. Step 1: Write the proportion equation
   113,788.81 : 156,939.81 = 72,956.83 : x
2. Step 2: Convert to fraction form
   113,788.81/156,939.81 = 72,956.83/x
3. Step 3: Cross multiply
   113,788.81x = 156,939.81 × 72,956.83
4. Step 4: Simplify right side
   113,788.81x = 11,449,831,038.40
5. Step 5: Solve for x
   x = 11,449,831,038.40/113,788.81
6. Step 6: Final answer
   x = 100,623.52