Finding the Fourth Proportional to 81,388.80, 112,086.72 and 69,975.36

Step by Step Solution

1. Step 1: Write the proportion equation
   81,388.80 : 112,086.72 = 69,975.36 : x
2. Step 2: Convert to fraction form
   81,388.80/112,086.72 = 69,975.36/x
3. Step 3: Cross multiply
   81,388.80x = 112,086.72 × 69,975.36
4. Step 4: Simplify right side
   81,388.80x = 7,843,308,583.22
5. Step 5: Solve for x
   x = 7,843,308,583.22/81,388.80
6. Step 6: Final answer
   x = 96,368.40