Finding the Fourth Proportional to 12,948,456.15, 17,868,870.45 and 7,147,239.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,948,456.15 : 17,868,870.45 = 7,147,239.39 : x
2. Step 2: Convert to fraction form
   12,948,456.15/17,868,870.45 = 7,147,239.39/x
3. Step 3: Cross multiply
   12,948,456.15x = 17,868,870.45 × 7,147,239.39
4. Step 4: Simplify right side
   12,948,456.15x = 127,713,094,735,047.02
5. Step 5: Solve for x
   x = 127,713,094,735,047.02/12,948,456.15
6. Step 6: Final answer
   x = 9,863,190.89