Finding the Fourth Proportional to 76,912,492.47, 106,139,244.79 and 42,105,182.91

Step by Step Solution

1. Step 1: Write the proportion equation
   76,912,492.47 : 106,139,244.79 = 42,105,182.91 : x
2. Step 2: Convert to fraction form
   76,912,492.47/106,139,244.79 = 42,105,182.91/x
3. Step 3: Cross multiply
   76,912,492.47x = 106,139,244.79 × 42,105,182.91
4. Step 4: Simplify right side
   76,912,492.47x = 4,469,012,315,972,299.50
5. Step 5: Solve for x
   x = 4,469,012,315,972,299.50/76,912,492.47
6. Step 6: Final answer
   x = 58,105,155.25