Finding the Fourth Proportional to 137,113.17, 205,667.60 and 99,909.33

Step by Step Solution

1. Step 1: Write the proportion equation
   137,113.17 : 205,667.60 = 99,909.33 : x
2. Step 2: Convert to fraction form
   137,113.17/205,667.60 = 99,909.33/x
3. Step 3: Cross multiply
   137,113.17x = 205,667.60 × 99,909.33
4. Step 4: Simplify right side
   137,113.17x = 20,548,111,619.16
5. Step 5: Solve for x
   x = 20,548,111,619.16/137,113.17
6. Step 6: Final answer
   x = 149,862.42