Finding the Fourth Proportional to 109,962.60, 151,739.32 and 64,642.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,962.60 : 151,739.32 = 64,642.50 : x
2. Step 2: Convert to fraction form
   109,962.60/151,739.32 = 64,642.50/x
3. Step 3: Cross multiply
   109,962.60x = 151,739.32 × 64,642.50
4. Step 4: Simplify right side
   109,962.60x = 9,808,808,993.10
5. Step 5: Solve for x
   x = 9,808,808,993.10/109,962.60
6. Step 6: Final answer
   x = 89,201.32