Finding the Fourth Proportional to 151,600,339.42, 209,209,098.71 and 81,985,720.28

Step by Step Solution

1. Step 1: Write the proportion equation
   151,600,339.42 : 209,209,098.71 = 81,985,720.28 : x
2. Step 2: Convert to fraction form
   151,600,339.42/209,209,098.71 = 81,985,720.28/x
3. Step 3: Cross multiply
   151,600,339.42x = 209,209,098.71 × 81,985,720.28
4. Step 4: Simplify right side
   151,600,339.42x = 17,152,158,646,027,890
5. Step 5: Solve for x
   x = 17,152,158,646,027,890/151,600,339.42
6. Step 6: Final answer
   x = 113,140,634.86