Finding the Fourth Proportional to 42,762,380.61, 64,143,567.72 and 19,726,499.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,762,380.61 : 64,143,567.72 = 19,726,499.12 : x
2. Step 2: Convert to fraction form
   42,762,380.61/64,143,567.72 = 19,726,499.12/x
3. Step 3: Cross multiply
   42,762,380.61x = 64,143,567.72 × 19,726,499.12
4. Step 4: Simplify right side
   42,762,380.61x = 1,265,328,031,861,522.50
5. Step 5: Solve for x
   x = 1,265,328,031,861,522.50/42,762,380.61
6. Step 6: Final answer
   x = 29,589,747.20