Finding the Fourth Proportional to 42,066,742.80, 63,106,019.10 and 13,309,879.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,066,742.80 : 63,106,019.10 = 13,309,879.80 : x
2. Step 2: Convert to fraction form
   42,066,742.80/63,106,019.10 = 13,309,879.80/x
3. Step 3: Cross multiply
   42,066,742.80x = 63,106,019.10 × 13,309,879.80
4. Step 4: Simplify right side
   42,066,742.80x = 839,933,528,877,504.25
5. Step 5: Solve for x
   x = 839,933,528,877,504.25/42,066,742.80
6. Step 6: Final answer
   x = 19,966,688.01