Finding the Fourth Proportional to 39,123,472.72, 58,691,976.50 and 13,215,962.68

Step by Step Solution

1. Step 1: Write the proportion equation
   39,123,472.72 : 58,691,976.50 = 13,215,962.68 : x
2. Step 2: Convert to fraction form
   39,123,472.72/58,691,976.50 = 13,215,962.68/x
3. Step 3: Cross multiply
   39,123,472.72x = 58,691,976.50 × 13,215,962.68
4. Step 4: Simplify right side
   39,123,472.72x = 775,670,971,039,437
5. Step 5: Solve for x
   x = 775,670,971,039,437/39,123,472.72
6. Step 6: Final answer
   x = 19,826,230.06