Finding the Fourth Proportional to 21,387,030.10, 32,076,608.55 and 13,285,507.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,387,030.10 : 32,076,608.55 = 13,285,507.30 : x
2. Step 2: Convert to fraction form
   21,387,030.10/32,076,608.55 = 13,285,507.30/x
3. Step 3: Cross multiply
   21,387,030.10x = 32,076,608.55 × 13,285,507.30
4. Step 4: Simplify right side
   21,387,030.10x = 426,154,017,050,267.44
5. Step 5: Solve for x
   x = 426,154,017,050,267.44/21,387,030.10
6. Step 6: Final answer
   x = 19,925,815.56