Finding the Fourth Proportional to 49,807.60, 69,905.60 and 49,807.60

Step by Step Solution

1. Step 1: Write the proportion equation
   49,807.60 : 69,905.60 = 49,807.60 : x
2. Step 2: Convert to fraction form
   49,807.60/69,905.60 = 49,807.60/x
3. Step 3: Cross multiply
   49,807.60x = 69,905.60 × 49,807.60
4. Step 4: Simplify right side
   49,807.60x = 3,481,830,162.56
5. Step 5: Solve for x
   x = 3,481,830,162.56/49,807.60
6. Step 6: Final answer
   x = 69,905.60