Finding the Fourth Proportional to 66,342.76, 91,487.82 and 56,298.76

Step by Step Solution

1. Step 1: Write the proportion equation
   66,342.76 : 91,487.82 = 56,298.76 : x
2. Step 2: Convert to fraction form
   66,342.76/91,487.82 = 56,298.76/x
3. Step 3: Cross multiply
   66,342.76x = 91,487.82 × 56,298.76
4. Step 4: Simplify right side
   66,342.76x = 5,150,650,821.10
5. Step 5: Solve for x
   x = 5,150,650,821.10/66,342.76
6. Step 6: Final answer
   x = 77,636.97