Finding the Fourth Proportional to 91,429.70, 137,020.01 and 55,903.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,429.70 : 137,020.01 = 55,903.50 : x
2. Step 2: Convert to fraction form
   91,429.70/137,020.01 = 55,903.50/x
3. Step 3: Cross multiply
   91,429.70x = 137,020.01 × 55,903.50
4. Step 4: Simplify right side
   91,429.70x = 7,659,897,849.52
5. Step 5: Solve for x
   x = 7,659,897,849.52/91,429.70
6. Step 6: Final answer
   x = 83,779.10