Finding the Fourth Proportional to 42,805,663.56, 64,229,490.54 and 20,088,407.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,805,663.56 : 64,229,490.54 = 20,088,407.88 : x
2. Step 2: Convert to fraction form
   42,805,663.56/64,229,490.54 = 20,088,407.88/x
3. Step 3: Cross multiply
   42,805,663.56x = 64,229,490.54 × 20,088,407.88
4. Step 4: Simplify right side
   42,805,663.56x = 1,290,268,203,892,121.25
5. Step 5: Solve for x
   x = 1,290,268,203,892,121.25/42,805,663.56
6. Step 6: Final answer
   x = 30,142,464.73