Finding the Fourth Proportional to 105,086,618.28, 145,018,667.39 and 57,401,912.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,086,618.28 : 145,018,667.39 = 57,401,912.07 : x
2. Step 2: Convert to fraction form
   105,086,618.28/145,018,667.39 = 57,401,912.07/x
3. Step 3: Cross multiply
   105,086,618.28x = 145,018,667.39 × 57,401,912.07
4. Step 4: Simplify right side
   105,086,618.28x = 8,324,348,793,742,346
5. Step 5: Solve for x
   x = 8,324,348,793,742,346/105,086,618.28
6. Step 6: Final answer
   x = 79,214,165.70