Finding the Fourth Proportional to 142,670,411.69, 196,885,196.57 and 86,915,830.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,670,411.69 : 196,885,196.57 = 86,915,830.05 : x
2. Step 2: Convert to fraction form
   142,670,411.69/196,885,196.57 = 86,915,830.05/x
3. Step 3: Cross multiply
   142,670,411.69x = 196,885,196.57 × 86,915,830.05
4. Step 4: Simplify right side
   142,670,411.69x = 17,112,440,284,656,252
5. Step 5: Solve for x
   x = 17,112,440,284,656,252/142,670,411.69
6. Step 6: Final answer
   x = 119,943,862.80