Finding the Fourth Proportional to 116,974,456.54, 161,435,578.70 and 64,763,492.20

Step by Step Solution

1. Step 1: Write the proportion equation
   116,974,456.54 : 161,435,578.70 = 64,763,492.20 : x
2. Step 2: Convert to fraction form
   116,974,456.54/161,435,578.70 = 64,763,492.20/x
3. Step 3: Cross multiply
   116,974,456.54x = 161,435,578.70 × 64,763,492.20
4. Step 4: Simplify right side
   116,974,456.54x = 10,455,131,841,939,936
5. Step 5: Solve for x
   x = 10,455,131,841,939,936/116,974,456.54
6. Step 6: Final answer
   x = 89,379,614.59