Finding the Fourth Proportional to 66,377.98, 99,530.06 and 21,980.52

Step by Step Solution

1. Step 1: Write the proportion equation
   66,377.98 : 99,530.06 = 21,980.52 : x
2. Step 2: Convert to fraction form
   66,377.98/99,530.06 = 21,980.52/x
3. Step 3: Cross multiply
   66,377.98x = 99,530.06 × 21,980.52
4. Step 4: Simplify right side
   66,377.98x = 2,187,721,976.78
5. Step 5: Solve for x
   x = 2,187,721,976.78/66,377.98
6. Step 6: Final answer
   x = 32,958.55