Finding the Fourth Proportional to 111,342, 166,594.50 and 78,126.87

Step by Step Solution

1. Step 1: Write the proportion equation
   111,342 : 166,594.50 = 78,126.87 : x
2. Step 2: Convert to fraction form
   111,342/166,594.50 = 78,126.87/x
3. Step 3: Cross multiply
   111,342x = 166,594.50 × 78,126.87
4. Step 4: Simplify right side
   111,342x = 13,015,506,844.22
5. Step 5: Solve for x
   x = 13,015,506,844.22/111,342
6. Step 6: Final answer
   x = 116,896.65