Finding the Fourth Proportional to 42,108,906.30, 63,169,384.78 and 12,965,211.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,108,906.30 : 63,169,384.78 = 12,965,211.06 : x
2. Step 2: Convert to fraction form
   42,108,906.30/63,169,384.78 = 12,965,211.06/x
3. Step 3: Cross multiply
   42,108,906.30x = 63,169,384.78 × 12,965,211.06
4. Step 4: Simplify right side
   42,108,906.30x = 819,004,406,203,051.75
5. Step 5: Solve for x
   x = 819,004,406,203,051.75/42,108,906.30
6. Step 6: Final answer
   x = 19,449,671.77