Finding the Fourth Proportional to 70,485.85, 105,704.18 and 28,355.01

Step by Step Solution

1. Step 1: Write the proportion equation
   70,485.85 : 105,704.18 = 28,355.01 : x
2. Step 2: Convert to fraction form
   70,485.85/105,704.18 = 28,355.01/x
3. Step 3: Cross multiply
   70,485.85x = 105,704.18 × 28,355.01
4. Step 4: Simplify right side
   70,485.85x = 2,997,243,080.94
5. Step 5: Solve for x
   x = 2,997,243,080.94/70,485.85
6. Step 6: Final answer
   x = 42,522.62