Finding the Fourth Proportional to 111,055.60, 166,739.64 and 64,360.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,055.60 : 166,739.64 = 64,360.72 : x
2. Step 2: Convert to fraction form
   111,055.60/166,739.64 = 64,360.72/x
3. Step 3: Cross multiply
   111,055.60x = 166,739.64 × 64,360.72
4. Step 4: Simplify right side
   111,055.60x = 10,731,483,282.94
5. Step 5: Solve for x
   x = 10,731,483,282.94/111,055.60
6. Step 6: Final answer
   x = 96,631.63