Finding the Fourth Proportional to 290,063,016.50, 435,106,524.03 and 85,591,094.18

Step by Step Solution

1. Step 1: Write the proportion equation
   290,063,016.50 : 435,106,524.03 = 85,591,094.18 : x
2. Step 2: Convert to fraction form
   290,063,016.50/435,106,524.03 = 85,591,094.18/x
3. Step 3: Cross multiply
   290,063,016.50x = 435,106,524.03 × 85,591,094.18
4. Step 4: Simplify right side
   290,063,016.50x = 37,241,243,476,584,160
5. Step 5: Solve for x
   x = 37,241,243,476,584,160/290,063,016.50
6. Step 6: Final answer
   x = 128,390,181.99