Finding the Fourth Proportional to 99,325,788.18, 137,068,499.90 and 54,670,805.54

Step by Step Solution

1. Step 1: Write the proportion equation
   99,325,788.18 : 137,068,499.90 = 54,670,805.54 : x
2. Step 2: Convert to fraction form
   99,325,788.18/137,068,499.90 = 54,670,805.54/x
3. Step 3: Cross multiply
   99,325,788.18x = 137,068,499.90 × 54,670,805.54
4. Step 4: Simplify right side
   99,325,788.18x = 7,493,645,302,733,713
5. Step 5: Solve for x
   x = 7,493,645,302,733,713/99,325,788.18
6. Step 6: Final answer
   x = 75,445,112.90