Finding the Fourth Proportional to 123,129,956.81, 169,878,081.71 and 70,917,947.21

Step by Step Solution

1. Step 1: Write the proportion equation
   123,129,956.81 : 169,878,081.71 = 70,917,947.21 : x
2. Step 2: Convert to fraction form
   123,129,956.81/169,878,081.71 = 70,917,947.21/x
3. Step 3: Cross multiply
   123,129,956.81x = 169,878,081.71 × 70,917,947.21
4. Step 4: Simplify right side
   123,129,956.81x = 12,047,404,829,641,868
5. Step 5: Solve for x
   x = 12,047,404,829,641,868/123,129,956.81
6. Step 6: Final answer
   x = 97,843,003.78