Finding the Fourth Proportional to 42,755,897.28, 64,144,475.04 and 12,464,026.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,755,897.28 : 64,144,475.04 = 12,464,026.56 : x
2. Step 2: Convert to fraction form
   42,755,897.28/64,144,475.04 = 12,464,026.56/x
3. Step 3: Cross multiply
   42,755,897.28x = 64,144,475.04 × 12,464,026.56
4. Step 4: Simplify right side
   42,755,897.28x = 799,498,440,575,817.12
5. Step 5: Solve for x
   x = 799,498,440,575,817.12/42,755,897.28
6. Step 6: Final answer
   x = 18,699,138.40