Finding the Fourth Proportional to 56,977,139.05, 78,628,342 and 30,872,363.47

Step by Step Solution

1. Step 1: Write the proportion equation
   56,977,139.05 : 78,628,342 = 30,872,363.47 : x
2. Step 2: Convert to fraction form
   56,977,139.05/78,628,342 = 30,872,363.47/x
3. Step 3: Cross multiply
   56,977,139.05x = 78,628,342 × 30,872,363.47
4. Step 4: Simplify right side
   56,977,139.05x = 2,427,442,753,267,466.50
5. Step 5: Solve for x
   x = 2,427,442,753,267,466.50/56,977,139.05
6. Step 6: Final answer
   x = 42,603,802.05