Finding the Fourth Proportional to 111,435,590.18, 166,402,976.22 and 91,005,837.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111,435,590.18 : 166,402,976.22 = 91,005,837.62 : x
2. Step 2: Convert to fraction form
   111,435,590.18/166,402,976.22 = 91,005,837.62/x
3. Step 3: Cross multiply
   111,435,590.18x = 166,402,976.22 × 91,005,837.62
4. Step 4: Simplify right side
   111,435,590.18x = 15,143,642,233,362,042
5. Step 5: Solve for x
   x = 15,143,642,233,362,042/111,435,590.18
6. Step 6: Final answer
   x = 135,895,921.66