Finding the Fourth Proportional to 12,912,897.60, 17,820,603.99 and 7,111,677.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912,897.60 : 17,820,603.99 = 7,111,677.83 : x
2. Step 2: Convert to fraction form
   12,912,897.60/17,820,603.99 = 7,111,677.83/x
3. Step 3: Cross multiply
   12,912,897.60x = 17,820,603.99 × 7,111,677.83
4. Step 4: Simplify right side
   12,912,897.60x = 126,734,394,223,789.52
5. Step 5: Solve for x
   x = 126,734,394,223,789.52/12,912,897.60
6. Step 6: Final answer
   x = 9,814,558.91