Finding the Fourth Proportional to 56,165,443.10, 78,858,368.50 and 56,165,443.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,165,443.10 : 78,858,368.50 = 56,165,443.10 : x
2. Step 2: Convert to fraction form
   56,165,443.10/78,858,368.50 = 56,165,443.10/x
3. Step 3: Cross multiply
   56,165,443.10x = 78,858,368.50 × 56,165,443.10
4. Step 4: Simplify right side
   56,165,443.10x = 4,429,115,208,945,582.50
5. Step 5: Solve for x
   x = 4,429,115,208,945,582.50/56,165,443.10
6. Step 6: Final answer
   x = 78,858,368.50