Finding the Fourth Proportional to 91,583.91, 137,395.59 and 28,402.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91,583.91 : 137,395.59 = 28,402.76 : x
2. Step 2: Convert to fraction form
   91,583.91/137,395.59 = 28,402.76/x
3. Step 3: Cross multiply
   91,583.91x = 137,395.59 × 28,402.76
4. Step 4: Simplify right side
   91,583.91x = 3,902,413,280.85
5. Step 5: Solve for x
   x = 3,902,413,280.85/91,583.91
6. Step 6: Final answer
   x = 42,610.25