Finding the Fourth Proportional to 109,789.21, 151,510.83 and 64,468.20

Step by Step Solution

1. Step 1: Write the proportion equation
   109,789.21 : 151,510.83 = 64,468.20 : x
2. Step 2: Convert to fraction form
   109,789.21/151,510.83 = 64,468.20/x
3. Step 3: Cross multiply
   109,789.21x = 151,510.83 × 64,468.20
4. Step 4: Simplify right side
   109,789.21x = 9,767,630,490.61
5. Step 5: Solve for x
   x = 9,767,630,490.61/109,789.21
6. Step 6: Final answer
   x = 88,967.13