Finding the Fourth Proportional to 91,810.56, 126,702.72 and 71,904

Step by Step Solution

1. Step 1: Write the proportion equation
   91,810.56 : 126,702.72 = 71,904 : x
2. Step 2: Convert to fraction form
   91,810.56/126,702.72 = 71,904/x
3. Step 3: Cross multiply
   91,810.56x = 126,702.72 × 71,904
4. Step 4: Simplify right side
   91,810.56x = 9,110,432,378.88
5. Step 5: Solve for x
   x = 9,110,432,378.88/91,810.56
6. Step 6: Final answer
   x = 99,230.77