Finding the Fourth Proportional to 22,248, 30,702.72 and 12,312

Step by Step Solution

1. Step 1: Write the proportion equation
   22,248 : 30,702.72 = 12,312 : x
2. Step 2: Convert to fraction form
   22,248/30,702.72 = 12,312/x
3. Step 3: Cross multiply
   22,248x = 30,702.72 × 12,312
4. Step 4: Simplify right side
   22,248x = 378,011,888.64
5. Step 5: Solve for x
   x = 378,011,888.64/22,248
6. Step 6: Final answer
   x = 16,990.83