Finding the Fourth Proportional to 99,758.99, 137,666.85 and 54,436.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,758.99 : 137,666.85 = 54,436.83 : x
2. Step 2: Convert to fraction form
   99,758.99/137,666.85 = 54,436.83/x
3. Step 3: Cross multiply
   99,758.99x = 137,666.85 × 54,436.83
4. Step 4: Simplify right side
   99,758.99x = 7,494,146,637.90
5. Step 5: Solve for x
   x = 7,494,146,637.90/99,758.99
6. Step 6: Final answer
   x = 75,122.52