Finding the Fourth Proportional to 99,305,824.19, 137,061,010.86 and 65,756,128.61

Step by Step Solution

1. Step 1: Write the proportion equation
   99,305,824.19 : 137,061,010.86 = 65,756,128.61 : x
2. Step 2: Convert to fraction form
   99,305,824.19/137,061,010.86 = 65,756,128.61/x
3. Step 3: Cross multiply
   99,305,824.19x = 137,061,010.86 × 65,756,128.61
4. Step 4: Simplify right side
   99,305,824.19x = 9,012,601,456,841,462
5. Step 5: Solve for x
   x = 9,012,601,456,841,462/99,305,824.19
6. Step 6: Final answer
   x = 90,756,020.92