Finding the Fourth Proportional to 42,070.05, 63,097.77 and 10,905.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,070.05 : 63,097.77 = 10,905.30 : x
2. Step 2: Convert to fraction form
   42,070.05/63,097.77 = 10,905.30/x
3. Step 3: Cross multiply
   42,070.05x = 63,097.77 × 10,905.30
4. Step 4: Simplify right side
   42,070.05x = 688,100,111.18
5. Step 5: Solve for x
   x = 688,100,111.18/42,070.05
6. Step 6: Final answer
   x = 16,356.06