Finding the Fourth Proportional to 42,680,145.84, 64,020,264.93 and 19,976,986.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680,145.84 : 64,020,264.93 = 19,976,986.32 : x
2. Step 2: Convert to fraction form
   42,680,145.84/64,020,264.93 = 19,976,986.32/x
3. Step 3: Cross multiply
   42,680,145.84x = 64,020,264.93 × 19,976,986.32
4. Step 4: Simplify right side
   42,680,145.84x = 1,278,931,956,709,385.75
5. Step 5: Solve for x
   x = 1,278,931,956,709,385.75/42,680,145.84
6. Step 6: Final answer
   x = 29,965,501.09