Finding the Fourth Proportional to 42,925,139.81, 64,414,193.61 and 19,891,781.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,925,139.81 : 64,414,193.61 = 19,891,781.05 : x
2. Step 2: Convert to fraction form
   42,925,139.81/64,414,193.61 = 19,891,781.05/x
3. Step 3: Cross multiply
   42,925,139.81x = 64,414,193.61 × 19,891,781.05
4. Step 4: Simplify right side
   42,925,139.81x = 1,281,313,035,802,429.25
5. Step 5: Solve for x
   x = 1,281,313,035,802,429.25/42,925,139.81
6. Step 6: Final answer
   x = 29,849,944.38