Finding the Fourth Proportional to 72,106.32, 99,506.52 and 40,275.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,106.32 : 99,506.52 = 40,275.28 : x
2. Step 2: Convert to fraction form
   72,106.32/99,506.52 = 40,275.28/x
3. Step 3: Cross multiply
   72,106.32x = 99,506.52 × 40,275.28
4. Step 4: Simplify right side
   72,106.32x = 4,007,652,954.83
5. Step 5: Solve for x
   x = 4,007,652,954.83/72,106.32
6. Step 6: Final answer
   x = 55,579.77