Finding the Fourth Proportional to 69,978.10, 104,928.62 and 47,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978.10 : 104,928.62 = 47,816.50 : x
2. Step 2: Convert to fraction form
   69,978.10/104,928.62 = 47,816.50/x
3. Step 3: Cross multiply
   69,978.10x = 104,928.62 × 47,816.50
4. Step 4: Simplify right side
   69,978.10x = 5,017,319,358.23
5. Step 5: Solve for x
   x = 5,017,319,358.23/69,978.10
6. Step 6: Final answer
   x = 71,698.42