Finding the Fourth Proportional to 70,056.16, 105,131.84 and 28,510.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,056.16 : 105,131.84 = 28,510.72 : x
2. Step 2: Convert to fraction form
   70,056.16/105,131.84 = 28,510.72/x
3. Step 3: Cross multiply
   70,056.16x = 105,131.84 × 28,510.72
4. Step 4: Simplify right side
   70,056.16x = 2,997,384,453.32
5. Step 5: Solve for x
   x = 2,997,384,453.32/70,056.16
6. Step 6: Final answer
   x = 42,785.45