Finding the Fourth Proportional to 161,978,487.62, 223,536,656.27 and 91,416,562.61

Step by Step Solution

1. Step 1: Write the proportion equation
   161,978,487.62 : 223,536,656.27 = 91,416,562.61 : x
2. Step 2: Convert to fraction form
   161,978,487.62/223,536,656.27 = 91,416,562.61/x
3. Step 3: Cross multiply
   161,978,487.62x = 223,536,656.27 × 91,416,562.61
4. Step 4: Simplify right side
   161,978,487.62x = 20,434,952,732,647,364
5. Step 5: Solve for x
   x = 20,434,952,732,647,364/161,978,487.62
6. Step 6: Final answer
   x = 126,158,436.43