Finding the Fourth Proportional to 70,488.28, 105,707.94 and 28,355.86

Step by Step Solution

1. Step 1: Write the proportion equation
   70,488.28 : 105,707.94 = 28,355.86 : x
2. Step 2: Convert to fraction form
   70,488.28/105,707.94 = 28,355.86/x
3. Step 3: Cross multiply
   70,488.28x = 105,707.94 × 28,355.86
4. Step 4: Simplify right side
   70,488.28x = 2,997,439,547.53
5. Step 5: Solve for x
   x = 2,997,439,547.53/70,488.28
6. Step 6: Final answer
   x = 42,523.94