Finding the Fourth Proportional to 91,638.63, 137,462.49 and 28,501.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91,638.63 : 137,462.49 = 28,501.76 : x
2. Step 2: Convert to fraction form
   91,638.63/137,462.49 = 28,501.76/x
3. Step 3: Cross multiply
   91,638.63x = 137,462.49 × 28,501.76
4. Step 4: Simplify right side
   91,638.63x = 3,917,922,211.67
5. Step 5: Solve for x
   x = 3,917,922,211.67/91,638.63
6. Step 6: Final answer
   x = 42,754.05