Finding the Fourth Proportional to 202,912, 280,019.52 and 113,488

Step by Step Solution

1. Step 1: Write the proportion equation
   202,912 : 280,019.52 = 113,488 : x
2. Step 2: Convert to fraction form
   202,912/280,019.52 = 113,488/x
3. Step 3: Cross multiply
   202,912x = 280,019.52 × 113,488
4. Step 4: Simplify right side
   202,912x = 31,778,855,285.76
5. Step 5: Solve for x
   x = 31,778,855,285.76/202,912
6. Step 6: Final answer
   x = 156,613.98