Finding the Fourth Proportional to 155,655.09, 214,789.46 and 91,980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   155,655.09 : 214,789.46 = 91,980.72 : x
2. Step 2: Convert to fraction form
   155,655.09/214,789.46 = 91,980.72/x
3. Step 3: Cross multiply
   155,655.09x = 214,789.46 × 91,980.72
4. Step 4: Simplify right side
   155,655.09x = 19,756,488,719.31
5. Step 5: Solve for x
   x = 19,756,488,719.31/155,655.09
6. Step 6: Final answer
   x = 126,924.78