Finding the Fourth Proportional to 28,077,969.40, 42,089,053.42 and 19,540,369.74

Step by Step Solution

1. Step 1: Write the proportion equation
   28,077,969.40 : 42,089,053.42 = 19,540,369.74 : x
2. Step 2: Convert to fraction form
   28,077,969.40/42,089,053.42 = 19,540,369.74/x
3. Step 3: Cross multiply
   28,077,969.40x = 42,089,053.42 × 19,540,369.74
4. Step 4: Simplify right side
   28,077,969.40x = 822,435,665,833,411.50
5. Step 5: Solve for x
   x = 822,435,665,833,411.50/28,077,969.40
6. Step 6: Final answer
   x = 29,291,137.62