Finding the Fourth Proportional to 149,318, 206,068.56 and 99,026.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149,318 : 206,068.56 = 99,026.72 : x
2. Step 2: Convert to fraction form
   149,318/206,068.56 = 99,026.72/x
3. Step 3: Cross multiply
   149,318x = 206,068.56 × 99,026.72
4. Step 4: Simplify right side
   149,318x = 20,406,293,591.92
5. Step 5: Solve for x
   x = 20,406,293,591.92/149,318
6. Step 6: Final answer
   x = 136,663.32