Finding the Fourth Proportional to 103,388,365.25, 142,675,944.84 and 56,978,619.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103,388,365.25 : 142,675,944.84 = 56,978,619.69 : x
2. Step 2: Convert to fraction form
   103,388,365.25/142,675,944.84 = 56,978,619.69/x
3. Step 3: Cross multiply
   103,388,365.25x = 142,675,944.84 × 56,978,619.69
4. Step 4: Simplify right side
   103,388,365.25x = 8,129,478,399,949,778
5. Step 5: Solve for x
   x = 8,129,478,399,949,778/103,388,365.25
6. Step 6: Final answer
   x = 78,630,495.61