Finding the Fourth Proportional to 91,708.56, 137,545.34 and 28,529.46

Step by Step Solution

1. Step 1: Write the proportion equation
   91,708.56 : 137,545.34 = 28,529.46 : x
2. Step 2: Convert to fraction form
   91,708.56/137,545.34 = 28,529.46/x
3. Step 3: Cross multiply
   91,708.56x = 137,545.34 × 28,529.46
4. Step 4: Simplify right side
   91,708.56x = 3,924,094,024.37
5. Step 5: Solve for x
   x = 3,924,094,024.37/91,708.56
6. Step 6: Final answer
   x = 42,788.75