Finding the Fourth Proportional to 111,347.25, 166,602.38 and 78,132.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,347.25 : 166,602.38 = 78,132.12 : x
2. Step 2: Convert to fraction form
   111,347.25/166,602.38 = 78,132.12/x
3. Step 3: Cross multiply
   111,347.25x = 166,602.38 × 78,132.12
4. Step 4: Simplify right side
   111,347.25x = 13,016,996,755.79
5. Step 5: Solve for x
   x = 13,016,996,755.79/111,347.25
6. Step 6: Final answer
   x = 116,904.52