Finding the Fourth Proportional to 72,103.98, 99,502.91 and 39,838.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,103.98 : 99,502.91 = 39,838.50 : x
2. Step 2: Convert to fraction form
   72,103.98/99,502.91 = 39,838.50/x
3. Step 3: Cross multiply
   72,103.98x = 99,502.91 × 39,838.50
4. Step 4: Simplify right side
   72,103.98x = 3,964,046,779.63
5. Step 5: Solve for x
   x = 3,964,046,779.63/72,103.98
6. Step 6: Final answer
   x = 54,976.81