Finding the Fourth Proportional to 103,388,364.50, 142,675,943.81 and 56,978,618.94

Step by Step Solution

1. Step 1: Write the proportion equation
   103,388,364.50 : 142,675,943.81 = 56,978,618.94 : x
2. Step 2: Convert to fraction form
   103,388,364.50/142,675,943.81 = 56,978,618.94/x
3. Step 3: Cross multiply
   103,388,364.50x = 142,675,943.81 × 56,978,618.94
4. Step 4: Simplify right side
   103,388,364.50x = 8,129,478,233,969,949
5. Step 5: Solve for x
   x = 8,129,478,233,969,949/103,388,364.50
6. Step 6: Final answer
   x = 78,630,494.58