Finding the Fourth Proportional to 109,978.80, 151,774.10 and 64,648.46

Step by Step Solution

1. Step 1: Write the proportion equation
   109,978.80 : 151,774.10 = 64,648.46 : x
2. Step 2: Convert to fraction form
   109,978.80/151,774.10 = 64,648.46/x
3. Step 3: Cross multiply
   109,978.80x = 151,774.10 × 64,648.46
4. Step 4: Simplify right side
   109,978.80x = 9,811,961,832.89
5. Step 5: Solve for x
   x = 9,811,961,832.89/109,978.80
6. Step 6: Final answer
   x = 89,216.85