Finding the Fourth Proportional to 13,120,780.62, 19,681,100.85 and 3,405,386.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120,780.62 : 19,681,100.85 = 3,405,386.53 : x
2. Step 2: Convert to fraction form
   13,120,780.62/19,681,100.85 = 3,405,386.53/x
3. Step 3: Cross multiply
   13,120,780.62x = 19,681,100.85 × 3,405,386.53
4. Step 4: Simplify right side
   13,120,780.62x = 67,021,755,642,463.01
5. Step 5: Solve for x
   x = 67,021,755,642,463.01/13,120,780.62
6. Step 6: Final answer
   x = 5,108,061.60