Finding the Fourth Proportional to 120,458,978.75, 166,234,387.12 and 65,454,835.25

Step by Step Solution

1. Step 1: Write the proportion equation
   120,458,978.75 : 166,234,387.12 = 65,454,835.25 : x
2. Step 2: Convert to fraction form
   120,458,978.75/166,234,387.12 = 65,454,835.25/x
3. Step 3: Cross multiply
   120,458,978.75x = 166,234,387.12 × 65,454,835.25
4. Step 4: Simplify right side
   120,458,978.75x = 10,880,844,422,076,270
5. Step 5: Solve for x
   x = 10,880,844,422,076,270/120,458,978.75
6. Step 6: Final answer
   x = 90,328,214.09