Finding the Fourth Proportional to 28,762,626.30, 42,986,338.06 and 20,997,891.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28,762,626.30 : 42,986,338.06 = 20,997,891.98 : x
2. Step 2: Convert to fraction form
   28,762,626.30/42,986,338.06 = 20,997,891.98/x
3. Step 3: Cross multiply
   28,762,626.30x = 42,986,338.06 × 20,997,891.98
4. Step 4: Simplify right side
   28,762,626.30x = 902,622,483,199,642.88
5. Step 5: Solve for x
   x = 902,622,483,199,642.88/28,762,626.30
6. Step 6: Final answer
   x = 31,381,782.52