Finding the Fourth Proportional to 56,990,339.37, 78,646,736.43 and 30,884,857.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,990,339.37 : 78,646,736.43 = 30,884,857.20 : x
2. Step 2: Convert to fraction form
   56,990,339.37/78,646,736.43 = 30,884,857.20/x
3. Step 3: Cross multiply
   56,990,339.37x = 78,646,736.43 × 30,884,857.20
4. Step 4: Simplify right side
   56,990,339.37x = 2,428,993,223,886,588
5. Step 5: Solve for x
   x = 2,428,993,223,886,588/56,990,339.37
6. Step 6: Final answer
   x = 42,621,139.84