Finding the Fourth Proportional to 69,998.12, 104,978.46 and 47,807.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69,998.12 : 104,978.46 = 47,807.72 : x
2. Step 2: Convert to fraction form
   69,998.12/104,978.46 = 47,807.72/x
3. Step 3: Cross multiply
   69,998.12x = 104,978.46 × 47,807.72
4. Step 4: Simplify right side
   69,998.12x = 5,018,780,821.71
5. Step 5: Solve for x
   x = 5,018,780,821.71/69,998.12
6. Step 6: Final answer
   x = 71,698.79