Finding the Fourth Proportional to 99,185.68, 136,873.56 and 53,861.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,185.68 : 136,873.56 = 53,861.59 : x
2. Step 2: Convert to fraction form
   99,185.68/136,873.56 = 53,861.59/x
3. Step 3: Cross multiply
   99,185.68x = 136,873.56 × 53,861.59
4. Step 4: Simplify right side
   99,185.68x = 7,372,227,570.56
5. Step 5: Solve for x
   x = 7,372,227,570.56/99,185.68
6. Step 6: Final answer
   x = 74,327.54