Finding the Fourth Proportional to 90,139,488.30, 135,209,022.18 and 59,210,377.20

Step by Step Solution

1. Step 1: Write the proportion equation
   90,139,488.30 : 135,209,022.18 = 59,210,377.20 : x
2. Step 2: Convert to fraction form
   90,139,488.30/135,209,022.18 = 59,210,377.20/x
3. Step 3: Cross multiply
   90,139,488.30x = 135,209,022.18 × 59,210,377.20
4. Step 4: Simplify right side
   90,139,488.30x = 8,005,777,203,444,922
5. Step 5: Solve for x
   x = 8,005,777,203,444,922/90,139,488.30
6. Step 6: Final answer
   x = 88,815,427.68