Finding the Fourth Proportional to 61,245,789.28, 91,886,619.89 and 18,116,141.18

Step by Step Solution

1. Step 1: Write the proportion equation
   61,245,789.28 : 91,886,619.89 = 18,116,141.18 : x
2. Step 2: Convert to fraction form
   61,245,789.28/91,886,619.89 = 18,116,141.18/x
3. Step 3: Cross multiply
   61,245,789.28x = 91,886,619.89 × 18,116,141.18
4. Step 4: Simplify right side
   61,245,789.28x = 1,664,630,978,389,655.50
5. Step 5: Solve for x
   x = 1,664,630,978,389,655.50/61,245,789.28
6. Step 6: Final answer
   x = 27,179,517.12