Finding the Fourth Proportional to 70,501.68, 105,678.24 and 28,411.64

Step by Step Solution

1. Step 1: Write the proportion equation
   70,501.68 : 105,678.24 = 28,411.64 : x
2. Step 2: Convert to fraction form
   70,501.68/105,678.24 = 28,411.64/x
3. Step 3: Cross multiply
   70,501.68x = 105,678.24 × 28,411.64
4. Step 4: Simplify right side
   70,501.68x = 3,002,492,110.71
5. Step 5: Solve for x
   x = 3,002,492,110.71/70,501.68
6. Step 6: Final answer
   x = 42,587.53