Finding the Fourth Proportional to 12,705,702.72, 19,062,111.60 and 5,137,982.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705,702.72 : 19,062,111.60 = 5,137,982.88 : x
2. Step 2: Convert to fraction form
   12,705,702.72/19,062,111.60 = 5,137,982.88/x
3. Step 3: Cross multiply
   12,705,702.72x = 19,062,111.60 × 5,137,982.88
4. Step 4: Simplify right side
   12,705,702.72x = 97,940,803,057,449.41
5. Step 5: Solve for x
   x = 97,940,803,057,449.41/12,705,702.72
6. Step 6: Final answer
   x = 7,708,412.92