Finding the Fourth Proportional to 91,434.79, 137,027.55 and 55,908.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,434.79 : 137,027.55 = 55,908.50 : x
2. Step 2: Convert to fraction form
   91,434.79/137,027.55 = 55,908.50/x
3. Step 3: Cross multiply
   91,434.79x = 137,027.55 × 55,908.50
4. Step 4: Simplify right side
   91,434.79x = 7,661,004,779.18
5. Step 5: Solve for x
   x = 7,661,004,779.18/91,434.79
6. Step 6: Final answer
   x = 83,786.55