Finding the Fourth Proportional to 151,722,632.39, 209,377,148.54 and 85,643,701.31

Step by Step Solution

1. Step 1: Write the proportion equation
   151,722,632.39 : 209,377,148.54 = 85,643,701.31 : x
2. Step 2: Convert to fraction form
   151,722,632.39/209,377,148.54 = 85,643,701.31/x
3. Step 3: Cross multiply
   151,722,632.39x = 209,377,148.54 × 85,643,701.31
4. Step 4: Simplify right side
   151,722,632.39x = 17,931,833,971,436,814
5. Step 5: Solve for x
   x = 17,931,833,971,436,814/151,722,632.39
6. Step 6: Final answer
   x = 118,188,260.31