Finding the Fourth Proportional to 99,109.91, 136,771.77 and 53,787.90

Step by Step Solution

1. Step 1: Write the proportion equation
   99,109.91 : 136,771.77 = 53,787.90 : x
2. Step 2: Convert to fraction form
   99,109.91/136,771.77 = 53,787.90/x
3. Step 3: Cross multiply
   99,109.91x = 136,771.77 × 53,787.90
4. Step 4: Simplify right side
   99,109.91x = 7,356,667,002.18
5. Step 5: Solve for x
   x = 7,356,667,002.18/99,109.91
6. Step 6: Final answer
   x = 74,227.36