Finding the Fourth Proportional to 107,295.48, 148,071.60 and 64,845.72

Step by Step Solution

1. Step 1: Write the proportion equation
   107,295.48 : 148,071.60 = 64,845.72 : x
2. Step 2: Convert to fraction form
   107,295.48/148,071.60 = 64,845.72/x
3. Step 3: Cross multiply
   107,295.48x = 148,071.60 × 64,845.72
4. Step 4: Simplify right side
   107,295.48x = 9,601,809,513.55
5. Step 5: Solve for x
   x = 9,601,809,513.55/107,295.48
6. Step 6: Final answer
   x = 89,489.41