Finding the Fourth Proportional to 91,747.69, 137,641.28 and 28,566.47

Step by Step Solution

1. Step 1: Write the proportion equation
   91,747.69 : 137,641.28 = 28,566.47 : x
2. Step 2: Convert to fraction form
   91,747.69/137,641.28 = 28,566.47/x
3. Step 3: Cross multiply
   91,747.69x = 137,641.28 × 28,566.47
4. Step 4: Simplify right side
   91,747.69x = 3,931,925,697.15
5. Step 5: Solve for x
   x = 3,931,925,697.15/91,747.69
6. Step 6: Final answer
   x = 42,855.86