Finding the Fourth Proportional to 42,805,625.31, 64,229,433.17 and 20,088,369.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,805,625.31 : 64,229,433.17 = 20,088,369.63 : x
2. Step 2: Convert to fraction form
   42,805,625.31/64,229,433.17 = 20,088,369.63/x
3. Step 3: Cross multiply
   42,805,625.31x = 64,229,433.17 × 20,088,369.63
4. Step 4: Simplify right side
   42,805,625.31x = 1,290,264,594,543,900.75
5. Step 5: Solve for x
   x = 1,290,264,594,543,900.75/42,805,625.31
6. Step 6: Final answer
   x = 30,142,407.34