Finding the Fourth Proportional to 99,172.87, 136,857.81 and 53,849.98

Step by Step Solution

1. Step 1: Write the proportion equation
   99,172.87 : 136,857.81 = 53,849.98 : x
2. Step 2: Convert to fraction form
   99,172.87/136,857.81 = 53,849.98/x
3. Step 3: Cross multiply
   99,172.87x = 136,857.81 × 53,849.98
4. Step 4: Simplify right side
   99,172.87x = 7,369,790,331.34
5. Step 5: Solve for x
   x = 7,369,790,331.34/99,172.87
6. Step 6: Final answer
   x = 74,312.56