Finding the Fourth Proportional to 85,977,147.98, 118,653,445.43 and 64,745,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,977,147.98 : 118,653,445.43 = 64,745,920.10 : x
2. Step 2: Convert to fraction form
   85,977,147.98/118,653,445.43 = 64,745,920.10/x
3. Step 3: Cross multiply
   85,977,147.98x = 118,653,445.43 × 64,745,920.10
4. Step 4: Simplify right side
   85,977,147.98x = 7,682,326,497,980,063
5. Step 5: Solve for x
   x = 7,682,326,497,980,063/85,977,147.98
6. Step 6: Final answer
   x = 89,353,120.90