Finding the Fourth Proportional to 86,468.32, 129,663.60 and 83,746.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,468.32 : 129,663.60 = 83,746.72 : x
2. Step 2: Convert to fraction form
   86,468.32/129,663.60 = 83,746.72/x
3. Step 3: Cross multiply
   86,468.32x = 129,663.60 × 83,746.72
4. Step 4: Simplify right side
   86,468.32x = 10,858,901,203.39
5. Step 5: Solve for x
   x = 10,858,901,203.39/86,468.32
6. Step 6: Final answer
   x = 125,582.42