Finding the Fourth Proportional to 28,069,345.67, 42,060,619.71 and 21,906,715.28

Step by Step Solution

1. Step 1: Write the proportion equation
   28,069,345.67 : 42,060,619.71 = 21,906,715.28 : x
2. Step 2: Convert to fraction form
   28,069,345.67/42,060,619.71 = 21,906,715.28/x
3. Step 3: Cross multiply
   28,069,345.67x = 42,060,619.71 × 21,906,715.28
4. Step 4: Simplify right side
   28,069,345.67x = 921,410,020,277,023
5. Step 5: Solve for x
   x = 921,410,020,277,023/28,069,345.67
6. Step 6: Final answer
   x = 32,826,202.34