Finding the Fourth Proportional to 105,174,485.90, 158,479,621.31 and 86,425,247.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,174,485.90 : 158,479,621.31 = 86,425,247.42 : x
2. Step 2: Convert to fraction form
   105,174,485.90/158,479,621.31 = 86,425,247.42/x
3. Step 3: Cross multiply
   105,174,485.90x = 158,479,621.31 × 86,425,247.42
4. Step 4: Simplify right side
   105,174,485.90x = 13,696,640,482,744,656
5. Step 5: Solve for x
   x = 13,696,640,482,744,656/105,174,485.90
6. Step 6: Final answer
   x = 130,227,786.38