Finding the Fourth Proportional to 151,166,694.29, 208,616,654.45 and 85,091,456.21

Step by Step Solution

1. Step 1: Write the proportion equation
   151,166,694.29 : 208,616,654.45 = 85,091,456.21 : x
2. Step 2: Convert to fraction form
   151,166,694.29/208,616,654.45 = 85,091,456.21/x
3. Step 3: Cross multiply
   151,166,694.29x = 208,616,654.45 × 85,091,456.21
4. Step 4: Simplify right side
   151,166,694.29x = 17,751,494,915,978,520
5. Step 5: Solve for x
   x = 17,751,494,915,978,520/151,166,694.29
6. Step 6: Final answer
   x = 117,429,933.89