Finding the Fourth Proportional to 72,134.76, 99,538.86 and 40,302.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,134.76 : 99,538.86 = 40,302.96 : x
2. Step 2: Convert to fraction form
   72,134.76/99,538.86 = 40,302.96/x
3. Step 3: Cross multiply
   72,134.76x = 99,538.86 × 40,302.96
4. Step 4: Simplify right side
   72,134.76x = 4,011,710,693.03
5. Step 5: Solve for x
   x = 4,011,710,693.03/72,134.76
6. Step 6: Final answer
   x = 55,614.11