Finding the Fourth Proportional to 13,117,531.20, 19,679,061.60 and 5,540,596.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,117,531.20 : 19,679,061.60 = 5,540,596.80 : x
2. Step 2: Convert to fraction form
   13,117,531.20/19,679,061.60 = 5,540,596.80/x
3. Step 3: Cross multiply
   13,117,531.20x = 19,679,061.60 × 5,540,596.80
4. Step 4: Simplify right side
   13,117,531.20x = 109,033,745,727,962.89
5. Step 5: Solve for x
   x = 109,033,745,727,962.89/13,117,531.20
6. Step 6: Final answer
   x = 8,312,063.00