Finding the Fourth Proportional to 156,362,196.69, 215,790,054.35 and 90,285,479.96

Step by Step Solution

1. Step 1: Write the proportion equation
   156,362,196.69 : 215,790,054.35 = 90,285,479.96 : x
2. Step 2: Convert to fraction form
   156,362,196.69/215,790,054.35 = 90,285,479.96/x
3. Step 3: Cross multiply
   156,362,196.69x = 215,790,054.35 × 90,285,479.96
4. Step 4: Simplify right side
   156,362,196.69x = 19,482,708,626,053,856
5. Step 5: Solve for x
   x = 19,482,708,626,053,856/156,362,196.69
6. Step 6: Final answer
   x = 124,599,865.18