Finding the Fourth Proportional to 99,570.03, 137,314.35 and 72,669.93

Step by Step Solution

1. Step 1: Write the proportion equation
   99,570.03 : 137,314.35 = 72,669.93 : x
2. Step 2: Convert to fraction form
   99,570.03/137,314.35 = 72,669.93/x
3. Step 3: Cross multiply
   99,570.03x = 137,314.35 × 72,669.93
4. Step 4: Simplify right side
   99,570.03x = 9,978,624,202.50
5. Step 5: Solve for x
   x = 9,978,624,202.50/99,570.03
6. Step 6: Final answer
   x = 100,217.15