Finding the Fourth Proportional to 53,790.50, 74,230.89 and 31,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,790.50 : 74,230.89 = 31,434.50 : x
2. Step 2: Convert to fraction form
   53,790.50/74,230.89 = 31,434.50/x
3. Step 3: Cross multiply
   53,790.50x = 74,230.89 × 31,434.50
4. Step 4: Simplify right side
   53,790.50x = 2,333,410,911.71
5. Step 5: Solve for x
   x = 2,333,410,911.71/53,790.50
6. Step 6: Final answer
   x = 43,379.61