Finding the Fourth Proportional to 39,123,466.72, 58,691,967.48 and 13,215,956.68

Step by Step Solution

1. Step 1: Write the proportion equation
   39,123,466.72 : 58,691,967.48 = 13,215,956.68 : x
2. Step 2: Convert to fraction form
   39,123,466.72/58,691,967.48 = 13,215,956.68/x
3. Step 3: Cross multiply
   39,123,466.72x = 58,691,967.48 × 13,215,956.68
4. Step 4: Simplify right side
   39,123,466.72x = 775,670,499,679,648.75
5. Step 5: Solve for x
   x = 775,670,499,679,648.75/39,123,466.72
6. Step 6: Final answer
   x = 19,826,221.06