Finding the Fourth Proportional to 99,980.83, 149,805.16 and 70,336.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,980.83 : 149,805.16 = 70,336.38 : x
2. Step 2: Convert to fraction form
   99,980.83/149,805.16 = 70,336.38/x
3. Step 3: Cross multiply
   99,980.83x = 149,805.16 × 70,336.38
4. Step 4: Simplify right side
   99,980.83x = 10,536,753,441.29
5. Step 5: Solve for x
   x = 10,536,753,441.29/99,980.83
6. Step 6: Final answer
   x = 105,387.74