Finding the Fourth Proportional to 91,601.76, 137,422.23 and 28,420.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,601.76 : 137,422.23 = 28,420.52 : x
2. Step 2: Convert to fraction form
   91,601.76/137,422.23 = 28,420.52/x
3. Step 3: Cross multiply
   91,601.76x = 137,422.23 × 28,420.52
4. Step 4: Simplify right side
   91,601.76x = 3,905,610,549.05
5. Step 5: Solve for x
   x = 3,905,610,549.05/91,601.76
6. Step 6: Final answer
   x = 42,636.85