Finding the Fourth Proportional to 99,141.93, 136,815.89 and 53,819.87

Step by Step Solution

1. Step 1: Write the proportion equation
   99,141.93 : 136,815.89 = 53,819.87 : x
2. Step 2: Convert to fraction form
   99,141.93/136,815.89 = 53,819.87/x
3. Step 3: Cross multiply
   99,141.93x = 136,815.89 × 53,819.87
4. Step 4: Simplify right side
   99,141.93x = 7,363,412,460.56
5. Step 5: Solve for x
   x = 7,363,412,460.56/99,141.93
6. Step 6: Final answer
   x = 74,271.43