Finding the Fourth Proportional to 42,109,953.86, 63,170,962.06 and 12,966,264.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,109,953.86 : 63,170,962.06 = 12,966,264.02 : x
2. Step 2: Convert to fraction form
   42,109,953.86/63,170,962.06 = 12,966,264.02/x
3. Step 3: Cross multiply
   42,109,953.86x = 63,170,962.06 × 12,966,264.02
4. Step 4: Simplify right side
   42,109,953.86x = 819,091,372,467,363.12
5. Step 5: Solve for x
   x = 819,091,372,467,363.12/42,109,953.86
6. Step 6: Final answer
   x = 19,451,253.15