Finding the Fourth Proportional to 99,829.30, 137,763.39 and 54,507.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,829.30 : 137,763.39 = 54,507.15 : x
2. Step 2: Convert to fraction form
   99,829.30/137,763.39 = 54,507.15/x
3. Step 3: Cross multiply
   99,829.30x = 137,763.39 × 54,507.15
4. Step 4: Simplify right side
   99,829.30x = 7,509,089,074.42
5. Step 5: Solve for x
   x = 7,509,089,074.42/99,829.30
6. Step 6: Final answer
   x = 75,219.29