Finding the Fourth Proportional to 80,415.77, 110,978.78 and 46,430.47

Step by Step Solution

1. Step 1: Write the proportion equation
   80,415.77 : 110,978.78 = 46,430.47 : x
2. Step 2: Convert to fraction form
   80,415.77/110,978.78 = 46,430.47/x
3. Step 3: Cross multiply
   80,415.77x = 110,978.78 × 46,430.47
4. Step 4: Simplify right side
   80,415.77x = 5,152,796,754.06
5. Step 5: Solve for x
   x = 5,152,796,754.06/80,415.77
6. Step 6: Final answer
   x = 64,076.95