Finding the Fourth Proportional to 116,866,860.42, 161,275,071.61 and 64,656,269.75

Step by Step Solution

1. Step 1: Write the proportion equation
   116,866,860.42 : 161,275,071.61 = 64,656,269.75 : x
2. Step 2: Convert to fraction form
   116,866,860.42/161,275,071.61 = 64,656,269.75/x
3. Step 3: Cross multiply
   116,866,860.42x = 161,275,071.61 × 64,656,269.75
4. Step 4: Simplify right side
   116,866,860.42x = 10,427,444,532,998,710
5. Step 5: Solve for x
   x = 10,427,444,532,998,710/116,866,860.42
6. Step 6: Final answer
   x = 89,224,990.69