Finding the Fourth Proportional to 28,136,573.62, 42,182,811.42 and 11,109,991.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,136,573.62 : 42,182,811.42 = 11,109,991.30 : x
2. Step 2: Convert to fraction form
   28,136,573.62/42,182,811.42 = 11,109,991.30/x
3. Step 3: Cross multiply
   28,136,573.62x = 42,182,811.42 × 11,109,991.30
4. Step 4: Simplify right side
   28,136,573.62x = 468,650,667,885,740.69
5. Step 5: Solve for x
   x = 468,650,667,885,740.69/28,136,573.62
6. Step 6: Final answer
   x = 16,656,280.69