Finding the Fourth Proportional to 30,699,986.18, 42,385,100.71 and 19,542,774.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,699,986.18 : 42,385,100.71 = 19,542,774.50 : x
2. Step 2: Convert to fraction form
   30,699,986.18/42,385,100.71 = 19,542,774.50/x
3. Step 3: Cross multiply
   30,699,986.18x = 42,385,100.71 × 19,542,774.50
4. Step 4: Simplify right side
   30,699,986.18x = 828,322,465,335,319.88
5. Step 5: Solve for x
   x = 828,322,465,335,319.88/30,699,986.18
6. Step 6: Final answer
   x = 26,981,199.95