Finding the Fourth Proportional to 99,422.56, 137,290.64 and 67,667.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,422.56 : 137,290.64 = 67,667.32 : x
2. Step 2: Convert to fraction form
   99,422.56/137,290.64 = 67,667.32/x
3. Step 3: Cross multiply
   99,422.56x = 137,290.64 × 67,667.32
4. Step 4: Simplify right side
   99,422.56x = 9,290,089,669.88
5. Step 5: Solve for x
   x = 9,290,089,669.88/99,422.56
6. Step 6: Final answer
   x = 93,440.46