Finding the Fourth Proportional to 61,043.31, 91,705.31 and 43,072.91

Step by Step Solution

1. Step 1: Write the proportion equation
   61,043.31 : 91,705.31 = 43,072.91 : x
2. Step 2: Convert to fraction form
   61,043.31/91,705.31 = 43,072.91/x
3. Step 3: Cross multiply
   61,043.31x = 91,705.31 × 43,072.91
4. Step 4: Simplify right side
   61,043.31x = 3,950,014,380.04
5. Step 5: Solve for x
   x = 3,950,014,380.04/61,043.31
6. Step 6: Final answer
   x = 64,708.39