Finding the Fourth Proportional to 21,601,775.52, 29,812,014.36 and 12,900,314.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601,775.52 : 29,812,014.36 = 12,900,314.88 : x
2. Step 2: Convert to fraction form
   21,601,775.52/29,812,014.36 = 12,900,314.88/x
3. Step 3: Cross multiply
   21,601,775.52x = 29,812,014.36 × 12,900,314.88
4. Step 4: Simplify right side
   21,601,775.52x = 384,584,372,451,081.69
5. Step 5: Solve for x
   x = 384,584,372,451,081.69/21,601,775.52
6. Step 6: Final answer
   x = 17,803,368.62